Query: sigma 105mm f1.4 art nikon

title: Sigma 85mm f/1.4 DG HSM Art Lens for Nikon F Cameras + Sigma USB Dock with Altura Photo Advanced Accessory and Travel Bundle
text: Product Description Included with this Bundle Sigma USB Dock – Easily update firmware and customize settings on Sigma lenses Sigma, 85mm F/1.4 DG HSM Art Lens for Nikon Minimum Aperture: F16 Minimum Focusing Distance: 85cm / 33.5in Filter Size: 86mm Maximum Magnifications: 1:8.5 Dimensions & Weight: 3.7in x 5in & 39.9oz This bundle features high-quality Altura Photo, AirBags, and MagicFiber accessories that can only be found here Read more Fully-packable ultra-light backpack with an inflatable insert to help protect your camera gear Shockproof Isolated upper and bottom compartments 25L capacity Weighs under 1 lb Water resistant 17.5” x 12” x 7” Camera ready Inflatable camera insert Inflatable removable divider Soft-flock material Packable 12” x 6” x 5” Premium features Reinforced stitching Mesh side pocket with adjustable bungee cord Exterior and interior storage pockets Padded mesh shoulder strap Premium ripstop nylon SanDisk Ultra 64 GB memory card Twice as fast as ordinary SDHC/SDXC cards Class 10 rating for Full HD video (1080p) Read more Altura Photo Mini Tripod Compact design that’s ready to go Rubberized grip Pistol grip Roll-out legs Push and lock tilt Altura Photo Wrist Strap Versatile, comfortable and strong Comfortable and strong neoprene Adjustable cinch Double riveted for durability Altura Photo Cleaning Kit Perfect for cleaning optical surfaces and sensitive electronics Hardshell case Blower Spray bottle (empty) Cleaning brush Premium lens tissue paper (50 sheets) MagicFiber Lens Pouches Gentle protection and convenient cleaning Includes 3 lens pouches (S,M,L) Microfiber material for cleaning Flap covers and gently protects Light and compact Read more 

title: Sigma 105mm f/1.4 DG HSM Art Lens for Nikon F + Sigma USB Dock with Altura Photo Advanced Accessory and Travel Bundle
text: Product Description Included with this Bundle Sigma USB Dock – Easily update firmware and customize settings on Sigma lenses Sigma, 105mm F/1.4 DG HSM Art Lens for Nikon F Minimum Aperture: F16 Minimum Focusing Distance: 10cm / 39.4in Filter Size: 105mm Maximum Magnifications: 1:8.3 Dimensions & Weight: 4.6in x 5.2in & 58oz This bundle features high-quality Altura Photo, AirBags, and MagicFiber accessories that can only be found here Read more Fully-packable ultra-light backpack with an inflatable insert to help protect your camera gear Shockproof Isolated upper and bottom compartments 25L capacity Weighs under 1 lb Water resistant 17.5” x 12” x 7” Camera ready Inflatable camera insert Inflatable removable divider Soft-flock material Packable 12” x 6” x 5” Premium features Reinforced stitching Mesh side pocket with adjustable bungee cord Exterior and interior storage pockets Padded mesh shoulder strap Premium ripstop nylon SanDisk Ultra 64 GB memory card Twice as fast as ordinary SDHC/SDXC cards Class 10 rating for Full HD video (1080p) Read more Altura Photo Mini Tripod Compact design that’s ready to go Rubberized grip Pistol grip Roll-out legs Push and lock tilt Altura Photo Wrist Strap Versatile, comfortable and strong Comfortable and strong neoprene Adjustable cinch Double riveted for durability Altura Photo Cleaning Kit Perfect for cleaning optical surfaces and sensitive electronics Hardshell case Blower Spray bottle (empty) Cleaning brush Premium lens tissue paper (50 sheets) MagicFiber Lens Pouches Gentle protection and convenient cleaning Includes 3 lens pouches (S,M,L) Microfiber material for cleaning Flap covers and gently protects Light and compact Read more 

title: Sigma 105mm f/1.4 DG HSM Art Lens For Nikon F (259955 )
text: Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume. Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume.

title: Sigma 105mm f/1.4 DG HSM Art Lens for Canon EF
text: Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume. Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume.

title: Sigma 259965 105mm f/1.4-16 Standard Fixed Prime Camera Lens, Black for Sony E Mount
text: Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume. Product Description Outstanding wide-aperture, mid-telephoto performance with F1.4 brightness at maximum aperture, this lens incorporates 17 optical elements in 12 groups, an uncommonly large number of elements for a prime lens. By including three FLD glass elements, two SLD glass elements, and one aspherical lens element, the optical system minimizes axial chromatic aberration to deliver extremely high resolution along with ample peripheral light volume.

title: SIGMA 135mm F1.8 DG HSM Art para Canon
text: Descripción del producto Proporciona la alta resolución necesaria para sacar el mayor partido a las cámaras dslr de 50 megapíxeles o más. Descripción del producto Proporciona la alta resolución necesaria para sacar el mayor partido a las cámaras dslr de 50 megapíxeles o más.Más información del producto El nuevo estándar en teleobjetivos de 135 mm Teleobjetivo para cámaras de fotograma completo ( Full Frame) refuerza aún más la línea Art Esta distancia focal ofrece un fuerte efecto de compresión de perspectiva, mientras que el gran diámetro con brillo F1.8 proporciona un efecto bokeh espectacular. Al minimizar la aberración cromática axial, el SIGMA 135mm F1.8 DG HSM | El arte hace que este efecto bokeh no solo sea impresionante, sino también hermoso, al tiempo que ofrece un contraste excelente y una calidad de imagen nítida en cada toma. Al incorporar las últimas innovaciones en diseño y vidrio óptico y repensar cada aspecto del objetivo, Sigma asegura una calidad de imagen sobresaliente hasta los bordes, estableciendo el nuevo estándar en teleobjetivos de 135 mm. La serie Art ofrece una expresión artística de alto nivel Con un rendimiento de reproducción asombroso que cumple con los más altos estándares, son perfectos para paisajes, retratos, naturalezas muertas, primeros planos y instantáneas casuales. Están hechos para el tipo de fotografía que da rienda suelta al artista interior. Un poderoso aliado en todos los géneros de fotografía, los objetivos de la línea Art de SIGMA sobresalen tanto en el estudio para trabajos formales como en exteriores para impresionantes tomas de arquitectura, cielos estrellados y muchas otras escenas. Diseñado para priorizar el rendimiento óptico Además de una distribución de energía optimizada, cuenta con dos elementos de cristal SLD (súper baja dispersión) y dos elementos de crsital FLD (“F” Baja dispersión). Estas tecnologías ayudan a minimizar las aberraciones cromáticas, que tienden a aparecer en el área del bokeh fuera del foco en los retratos, así como en objetos delgados como ramas finas. El resultado final es una resolución ultra alta y claridad en toda la imagen, incluso con una apertura muy abierta. Con las últimas tecnologías de SIGMA Para lograr un rendimiento óptico sobresaliente y una facilidad de uso satisfactoria, este objetivo cuenta con las últimas tecnologías SIGMA, que incluyen un gran motor hipersónico (HSM), una estructura resistente al polvo y las salpicaduras, bayoneta metálica y diagfragma de 9 hojas circular como características de alta calidad. Ideal para retratos La distancia focal de 135 mm ofrece un efecto de compresión sorprendente: incluso bastante cerca del sujeto, permite al fotógrafo establecer una variedad de perspectivas dramáticas. El efecto de compresión realmente brilla tanto en primeros planos como en retratos de cuerpo entero, lo que facilita la composición. Además, el gran diámetro con luminosidad F1.8 hace posible una toma de cuerpo con un impresionante fondo bokeh. En resumen, este objetivo ofrece un menú completo de opciones de composición al alcance del fotógrafo. Leer más Poder de resolución excepcionaly las aberraciones cromáticas minimizadas ayudan a hacer esto el objetivo definitivo para retratos. Con una resolución tan nítida que se pueden distinguir los pelos individuales en un retrato, esta lente de gran diámetro también ofrece un hermoso efecto bokeh, lo que brinda a los fotógrafos todo lo que necesitan. Funciona mejor que los típicos teleobjetivos de gran diámetro estándar a medio para producir primeros planos y tomas de cuerpo entero en las que el sujeto destaca sobre un fondo agradablemente borroso. Independientemente de la distancia del sujeto, este objetivo ofrece un rendimiento superior desde el centro hasta los bordes de la imagen. Al minimizar también la distorsión, la lente ofrece una calidad de imagen impecable, sin necesidad de ajustes digitales durante el procesamiento de la imagen. Leer más Especificaciones Técnicas Construcción del objetivo 13 elementos en 10 grupos Apertura mínima 18,2 ° Nº de hojas del diafragma 9 (diafragma redondeado) Apertura mínima F16 Distancia mínima de enfoque 87,5 cm Ampliación máxima 1: 5 Tamaño del filtro φ82mm Dimensiones (diámetro x largo) 91.4mm × 114.9mm Peso 1,130g 

title: Sigma 105mm f/1.4 DG HSM Art Lens for Sony E Mount with Altura Photo Advanced Accessory and Travel Bundle
text: Product Description Sigma, 105mm F/1.4 DG HSM Art Lens for Sony E Minimum Aperture: F16 Minimum Focusing Distance: 100cm / 39.4in Filter Size: 105mm Maximum Magnifications: 1:8.3 Dimensions & Weight: 4.6in x 5.2in & 58oz Read more This bundle features high-quality Altura Photo, AirBags, and MagicFiber accessories that can only be found here Read more Fully-packable ultra-light backpack with an inflatable insert to help protect your camera gear Shockproof Isolated upper and bottom compartments 25L capacity Weighs under 1 lb Water resistant 17.5” x 12” x 7” Camera ready Inflatable camera insert Inflatable removable divider Soft-flock material Packable 12” x 6” x 5” Premium features Reinforced stitching Mesh side pocket with adjustable bungee cord Exterior and interior storage pockets Padded mesh shoulder strap Premium ripstop nylon SanDisk Ultra 64 GB memory card Twice as fast as ordinary SDHC/SDXC cards Class 10 rating for Full HD video (1080p) Read more Altura Photo Mini Tripod Compact design that’s ready to go Rubberized grip Pistol grip Roll-out legs Push and lock tilt Altura Photo Wrist Strap Versatile, comfortable and strong Comfortable and strong neoprene Adjustable cinch Double riveted for durability Altura Photo Cleaning Kit Perfect for cleaning optical surfaces and sensitive electronics Hardshell case Blower Spray bottle (empty) Cleaning brush Premium lens tissue paper (50 sheets) MagicFiber Lens Pouches Gentle protection and convenient cleaning Includes 3 lens pouches (S,M,L) Microfiber material for cleaning Flap covers and gently protects Light and compact Read more 

title: Sigma 85mm f/1.4 DG HSM Art Lens for Nikon F (321955)
text: Product Description SIGMA 85MM LENS NIKON F F/1.4 DG HSM ART LENS Product Description SIGMA 85MM LENS NIKON F F/1.4 DG HSM ART LENSFrom the manufacturer SIGMA 85 mm F1,4 DG HSM Art Portrait photographers require an attractive bokeh that only offer large-diameter lenses, as well as a superior resolution. Since the SIGMA 85mm F1.4 DG HSM | Art representing the high standards of the Art product line, it meets both requirements at the highest level. The extremely precise bokeh makes it possible, for example, to focus on the pupil of the model and at the same time make the eyelashes blur. Add to this impressive bokeh, the focus area is extremely high resolution. In the SIGMA 85mm F1.4 DG HSM | Type 14 lens elements are built in 12 groups - a remarkable structure that brings the ultra-high resolution of the lens. Therefore, this lens is an excellent choice for full-frame DSLRs with a resolution of 50 megapixels and more. Outstanding resolving power and minimized chromatic aberration contribute to the 85mm F1.4 DG HSM | Art is the ultimate lens for portraits Read more properties construction Special low dispersion (SLD) glass elements and optimized power distribution help minimize longitudinal chromatic aberrations. In the areas in front of and behind the focal point, the optical system provides an attractive and natural bokeh, with an absolutely gentle sharpness, with virtually no streaking. Newly developed HSM for a fast AF The redesigned HSM (Hyper Sonic engine) delivers 1.3 times the speed of its predecessor. Even at low speeds, it offers exceptionally stable performance and the improved AF algorithm contributes to fast autofocus. In addition, thanks to the manual override function, turning the focus ring even in the focus tracking AF mode allows manual focusing. So the perfect focus point is found quickly, without first having to press the focus switch. Compatible with the connection converter MC-11 Owners of different camera systems can now use their valuable lenses flexibly and Sony E-mount camera owners can enjoy a bright medium telephoto lens. Read more properties Round aperture The nearly round aperture consists of 9 aperture blades and provides a very pleasant bokeh outside the focal plane of the picture. The Super Multi-Layer Compensation (SML) prevents reflections and ghosting for sharp and high-contrast images. SIGMA USB dock With this USB dock the new SIGMA lenses of the product lines Contemporary, Art and Sports can be adapted to the personal needs of every photographer. For this purpose we have developed a special software (SIGMA Optimization Pro), with which you can easily update the lens firmware and, for example, Adjust focus parameters Own A1 MTF measuring system We have our own A1 MTF (Modulation Transfer Function) measurement system, which uses the 46 megapixel Foveon direct image sensor. Using this system, we review every lens of our new product line in our factory. Even previously unrecognizable high-frequency details have now become auditable as part of our quality control, which allows us to deliver consistently high lens performance. Read more properties SIGMA connection change service We offer our customers our fee-based connection change service. As part of this service, we convert the connection of the lenses of the product lines Contemporary, Art and Sports by replacing all relevant parts on customer request. Made in Japan We are focused on optimizing the quality with our integrated production system, with our own hands and our own techniques. We are one of the few manufacturers whose products are exclusively "Made in Japan". We are proud of the authentic quality of SIGMA products as a result of a combination of highly specialized expertise and intelligent modern technology. Type - product line Designed for unsurpassed expressiveness, our Art Product line lenses are for those who seek high-performance, high-performance lenses for artistic freedom. Read more DG Lenses The DG lenses are designed for demanding use on digital SLR cameras up to full format. These lenses illuminate the full 35mm-KB format and are therefore equally suitable for use on 35mm film SLR cameras as well as digital SLR cameras. By using modern tempering techniques, ghosting is successfully eliminated by reflections on the surface of the sensor while achieving a balanced color balance. ASP - aspherical correction Normally, near-edge rays are more strongly refracted toward the center when passing through a lens than near-axis rays. The aspherical correction of an optical system eliminates numerous aberrations at once. The sharpness is achieved over the entire image field and the distortion is reduced to a minimum. Almost all our lenses are equipped with at least one aspherical lens element. HSM - Hyper Sonic engine HSM Ultrasonic Motor (Hyper Sonic Motor) - HSM lenses use a motor powered by ultrasonic waves. This technology provides you with a very fast, accurate and almost silent type of auto focus. Two different types of HSM ultrasonic drive are used in our lenses. First, the HSM ring motor, which is mainly installed in the high-quality EX lenses. This HSM drive allows you to manually engage in AF operation at any time. On the other hand, an HSM micromotor is primarily used in compact lenses, the so-called all-round zoom lenses. Here a manual intervention in the AF operation is not possible. IF - internal focusing For inner focus lenses, only one or more lens groups are moved inside the lens for focus. This results in many advantages, as with rear-focus lenses: the inner focus ensures faster and quieter focusing. With IF lenses, the length of the lens remains constant during focusing and the front lens does not rotate, allowing you to conveniently use polar filters and a tulip-shaped lens hood. Since the length of the lens remains constant during focusing, there is no noticeable shift in focus during focusing. As a result, the lens is well balanced at all times. Read more 

title: Sigma 50 mm f/1.4 - Objetivo para Nikon (50mm, f/1.4, zoom óptico 1x, 77 mm), color negro
text: Descripción del producto Accesorios incluidos:Parasol, tapa antipolvo, tapa para objetivo, Tipo de montaje:Nikon F, Tamaño del filtro:77 mm, Ajuste de foco:Automático, manual, Apertura de la lente:F/1.4, Apertura mínima:F/16, Ángulo de visión máx.:46.8 grados, Revestimiento antirreflejante de la lente:Recubrimiento multicapa superior, Hojas del diafragma:9, Características:Motor hipersónico (HSM), lente de forma esférica imperfecta, cristal SLD (baja dispersión especial), admite anclaje USB Sigma, Construcción de la lente:8 grupo(s) / 13 elemento(s), Ampliación:1 / 5.6, Tipo:Lente, Distancia de enfoque mín.:40 cm, Distancia focal:50 mm, Pensado para:SLR de 35 mm, SLR digital Descripción del producto Accesorios incluidos:Parasol, tapa antipolvo, tapa para objetivo, Tipo de montaje:Nikon F, Tamaño del filtro:77 mm, Ajuste de foco:Automático, manual, Apertura de la lente:F/1.4, Apertura mínima:F/16, Ángulo de visión máx.:46.8 grados, Revestimiento antirreflejante de la lente:Recubrimiento multicapa superior, Hojas del diafragma:9, Características:Motor hipersónico (HSM), lente de forma esférica imperfecta, cristal SLD (baja dispersión especial), admite anclaje USB Sigma, Construcción de la lente:8 grupo(s) / 13 elemento(s), Ampliación:1 / 5.6, Tipo:Lente, Distancia de enfoque mín.:40 cm, Distancia focal:50 mm, Pensado para:SLR de 35 mm, SLR digitalMás información del producto 50mm F1.4 DG HSM Art Diseñado para ofrecer mayor rendimiento, este objetivo 50mm F1.4 representa a la perfección los ideales de la línea Art. Una de las mejores creaciones de Sigma. Cumpliendo con el concepto de nuestra línea Art al más alto nível, el 50mm F1.4 DG HSM es un objetivo estándar de gran apertura que ofrece un excelente rendimiento. Su altisíma definición hace que sea ideal para la era de los elevados megapíxeles. Leer más Ofrece imágenes exquisitamente equilibradas con un bonito efecto bokeh, estableciendo un punto de referencia para los objetivos estándar de gran apertura. Es la máxima expresión de las prestaciones de los objetivos de 50mm F1.4, conocidos por llevar a cabo la personalidad y la visión única del fotógrafo. Una calidad que supera las expectativas en todos los sentidos. Diseñado con un enfoque en el rendimiento óptico sofisticado y abundante fuerza expresiva, la línea Art ofrece una calidad de imagen superior para la expresión artística de alto nivel. Mientras mejoramos la maximización de resolución en la área de enfoque, este objetivo ofrece un bokeh suave y precioso a la parte frontal y trasera. Para obtener una resolución excepcionalmente nítida, hemos reducido al mínimo el coma sagital del destello, la aberración cromática, y cualquier otro tipo de aberración óptica que afecte la calidad de imagen. El resultado es detalle minucioso límpio, lo mismo en grandes y amplias aperturas. Además, también hemos minimizado el efecto de viñeteo y pérdida de color en la parte frontal y trasera de la área de enfoque, estableciendo así un efecto bokeh natural y estéticamente. Leer más 

title: Sigma 35mm F1.4 Art DG HSM Lens for Nikon DSLR Cameras + Sigma USB Dock with Altura Photo Essential Accessory and Travel Bundle
text: Product Description Included with this Bundle Sigma USB Dock – Easily update firmware and customize settings on Sigma Lenses Sigma, 35mm F/1.4 DG HSM Art Lens Minimum Aperture: F16 Minimum Focusing Distance: 30cm / 11.8in Filter Size: 67mm Maximum Magnifications: 1:5.2 Dimensions & Weight: 3in x 3.7in & 23.5oz This bundle features high-quality Altura Photo, AirBags, and MagicFiber accessories that can only be found here Read more Fully-packable ultra-light backpack with an inflatable insert to help protect your camera gear Shockproof Isolated upper and bottom compartments 25L capacity Weighs under 1 lb Water resistant 17.5” x 12” x 7” Camera ready Inflatable camera insert Inflatable removable divider Soft-flock material Packable 12” x 6” x 5” Premium features Reinforced stitching Mesh side pocket with adjustable bungee cord Exterior and interior storage pockets Padded mesh shoulder strap Premium ripstop nylon Packed and ready to go Packs to an 8" x 8" square Packs with or without camera insert Slips easily into luggage Read more Altura Photo Mini Tripod Compact design that’s ready to go Rubberized grip Pistol grip Roll-out legs Push and lock tilt Altura Photo Wrist Strap Versatile, comfortable and strong Comfortable and strong neoprene Adjustable cinch Double riveted for durability Altura Photo Cleaning Kit Perfect for cleaning optical surfaces and sensitive electronics Hardshell case Blower Spray bottle (empty) Cleaning brush Premium lens tissue paper (50 sheets) MagicFiber Lens Pouches Gentle protection and convenient cleaning Includes 3 lens pouches (S,M,L) Microfiber material for cleaning Read more 

title: SIGMA Standard Zoom Lens 24-105mm F4 DG OS HSM for Full Size
text: Product description 商品紹介 近年、デジタル一眼レフカメラの高画素化が急速に進み、高画素センサーの能力を十二分に発揮できるレンズが求められています。それはズームレンズにおいても同様です。24-105mm F4 DG HSMは、こうした要求に十二分に満たし、広角から中望遠まで安定した高画質を提供するArtラインの新しい標準ズームレンズです。F値が変化せず、中望遠域まで撮影可能かつ安定した高画質を実現するため、数多くのシミュレーションを行い、35mm判フルサイズに対応したスペックを選択しました。 Amazonより デジタルカメラ高画素化にも十二分に応えうる描写力。フルサイズ対応高性能標準ズームレンズ 35mm フルサイズにおける基本撮影域をカバー ネイチャーフォトや旅先での撮影では、様々な被写体にすばやく対応できる様、ある程度の高いズーム比、機動力が求められる。 SIGMA 24-105mm F4 DG OS HSMは、広角から中望遠までの基本的な撮影域をカバーするズームレンズ。 さらにズーム全域でF4の明るさを確保し、手ブレ補正OS(Optical Stabilizer)機構やHSMを搭載する等、使い勝手も優れており、スナップ、ポートレート、風景撮影などあらゆるシーンで機動力を発揮する。 ※ ソニー用は手ブレ補正機構を搭載しておりません。 大口径82mm、周辺光量の低下に配慮した余裕の光学性能 ズーム比の高い標準ズームでは、非点収差、像面湾曲、ディストーション、色収差などが発生しやすい傾向がある。それらの収差を補正するため、FLDガラス、SLDガラス、両面非球面レンズを含むグラスモールド非球面レンズといった高性能レンズを適切に配置。 さらに、望遠側においても軸上色収差を効果的に補正しズーム全域で高い描写性能を発揮。同等仕様のレンズで目立ちやすい周辺光量の低下にも配慮。大口径82mmのフィルターサイズにより、余裕を持った光学性能を実現している。 手ブレ補正機構搭載 手ブレ補正OS(Optical Stabilizer)機構を搭載し、室内や夕景の撮影や近接撮影に威力を発揮。 ※ソニー用は手ブレ補正OS 機構を搭載しておりません。 フレア・ゴーストに配慮した設計 レンズ設計の初期段階からフレア、ゴースト対策を徹底し、逆光のような強い入射光に対しても影響を受けにくい設計を行っている。 さらにスーパーマルチレイヤーコートを採用する事で、フレア、ゴーストの発生を軽減、逆光時の撮影においてもコントラストの高い描写を実現。 作例 焦点距離 24mm f/4 焦点距離 105mm f/8 焦点距離 105mm f/8 高水準の芸術的表現を叶えるArt ライン シグマは、すべての交換レンズをContemporary、Art、Sports の3 つのプロダクトラインに集約。 その中でArt ラインは、あらゆる設計要素を最高の光学性能と豊かな表現力に集中して開発、高水準の芸術的表現を叶えます。高度な要求水準を満たす圧倒的な描写性能で、風景、ポートレート、静物、接写、スナップをはじめ、作家性を生かした写真づくりに適しています。作品世界をつくり込むスタジオ撮影や、建築、天体、水中などあらゆるジャンルでの表現にも応えます。 Product description 商品紹介 近年、デジタル一眼レフカメラの高画素化が急速に進み、高画素センサーの能力を十二分に発揮できるレンズが求められています。それはズームレンズにおいても同様です。24-105mm F4 DG HSMは、こうした要求に十二分に満たし、広角から中望遠まで安定した高画質を提供するArtラインの新しい標準ズームレンズです。F値が変化せず、中望遠域まで撮影可能かつ安定した高画質を実現するため、数多くのシミュレーションを行い、35mm判フルサイズに対応したスペックを選択しました。 Amazonより デジタルカメラ高画素化にも十二分に応えうる描写力。フルサイズ対応高性能標準ズームレンズ 35mm フルサイズにおける基本撮影域をカバー ネイチャーフォトや旅先での撮影では、様々な被写体にすばやく対応できる様、ある程度の高いズーム比、機動力が求められる。 SIGMA 24-105mm F4 DG OS HSMは、広角から中望遠までの基本的な撮影域をカバーするズームレンズ。 さらにズーム全域でF4の明るさを確保し、手ブレ補正OS(Optical Stabilizer)機構やHSMを搭載する等、使い勝手も優れており、スナップ、ポートレート、風景撮影などあらゆるシーンで機動力を発揮する。 ※ ソニー用は手ブレ補正機構を搭載しておりません。 大口径82mm、周辺光量の低下に配慮した余裕の光学性能 ズーム比の高い標準ズームでは、非点収差、像面湾曲、ディストーション、色収差などが発生しやすい傾向がある。それらの収差を補正するため、FLDガラス、SLDガラス、両面非球面レンズを含むグラスモールド非球面レンズといった高性能レンズを適切に配置。 さらに、望遠側においても軸上色収差を効果的に補正しズーム全域で高い描写性能を発揮。同等仕様のレンズで目立ちやすい周辺光量の低下にも配慮。大口径82mmのフィルターサイズにより、余裕を持った光学性能を実現している。 手ブレ補正機構搭載 手ブレ補正OS(Optical Stabilizer)機構を搭載し、室内や夕景の撮影や近接撮影に威力を発揮。 ※ソニー用は手ブレ補正OS 機構を搭載しておりません。 フレア・ゴーストに配慮した設計 レンズ設計の初期段階からフレア、ゴースト対策を徹底し、逆光のような強い入射光に対しても影響を受けにくい設計を行っている。 さらにスーパーマルチレイヤーコートを採用する事で、フレア、ゴーストの発生を軽減、逆光時の撮影においてもコントラストの高い描写を実現。 作例 焦点距離 24mm f/4 焦点距離 105mm f/8 焦点距離 105mm f/8 高水準の芸術的表現を叶えるArt ライン シグマは、すべての交換レンズをContemporary、Art、Sports の3 つのプロダクトラインに集約。 その中でArt ラインは、あらゆる設計要素を最高の光学性能と豊かな表現力に集中して開発、高水準の芸術的表現を叶えます。高度な要求水準を満たす圧倒的な描写性能で、風景、ポートレート、静物、接写、スナップをはじめ、作家性を生かした写真づくりに適しています。作品世界をつくり込むスタジオ撮影や、建築、天体、水中などあらゆるジャンルでの表現にも応えます。From the Manufacturer High Definition Standard Zoom Enough for High Resolution Digital Cameras Sigma is confident in the pursuit of "high image quality even with a zoom lens," this large aperture standard zoom lens. (more) Features Covers a full 35mm format basic shooting range from wide angle to medium telephoto The F4 is secured throughout the zoom range, and it can be used in a wide angle to medium telephoto shoot. Large aperture of 3.2 inches (82 mm), with ample optical performance for lowering ambient light Compared to the same lens specs, it also has a reduction in peripheral light compared to lenses with an equal spec, providing excellent portability. Refined in material, usability and function Designed to be highly fused in pursuit of the essential functions of photographers. (more) Features Customizable Lenses "Customize Now" with the exclusive software and SIGMA USB DOCK. Compatible with "mount replacement service" (free charge) Even if you change the camera body, you can enjoy the lens without the same change. (more) SIGMA 635541 Standard Zoom Lens for Art 24-105mm F4 DG OS HSM Canon Full Size SIGMA 210540 Standard Zoom Lens Art 18-35mm F1.8 DC HSM for Canon APS-C SIGMA 583545 Standard Zoom Lens 17-50mm F2.8 EX DC OS HSM for Canon APS-C Only SIGMA 203559 Ultra Wide Angle Zoom Lens, 0.3 - 0.6 inches (8 - 16 mm), F4.5 - 5.6 inches (5.6 mm), DC HSM for Nikon, APS-C Only Lens Components: 19 sheets in 14 groups. 17 sheets in 12 groups. 17 sheets in 13 groups. 15 sheets in 11 groups. Angle of View 84.1°-23.3° (35mm format) 76.5° - 44.2° (DC) 79.7 - 31.7°(DC) 121.2 - 83.2° (DC) Aperture Blades: 9 sheets (circular tips) 9 sheets (circular tips) 7 sheets (circular tips) 7 pieces Minimum aperture F22 F16 F22 F22 Minimum Focus Distance 45cm 28cm 28cm 24cm

title: Sigma 18-35mm F1.8 Art DC HSM Lens for Canon, Black (210101)
text: Product Description First wide-angle to standard zoom lens to achieve a large aperture of 1.8 Due to the very shallow depth of field (DOF) of fast glass and focus variation between the cameras, users may experience focus shift and inconsistent AF. This can be fixed by using the AF fine tune ( For Nikon System) or AF Micro Adjustment( For Canon System) in the camera’s Menu to calibrate the lens to specific cameras. Also shooting at smaller aperture values will increase the DOF which reduces “focus issues” as the result of the variations and decreases the amount of fall of (Vignetting). Product Description First wide-angle to standard zoom lens to achieve a large aperture of 1.8 Due to the very shallow depth of field (DOF) of fast glass and focus variation between the cameras, users may experience focus shift and inconsistent AF. This can be fixed by using the AF fine tune ( For Nikon System) or AF Micro Adjustment( For Canon System) in the camera’s Menu to calibrate the lens to specific cameras. Also shooting at smaller aperture values will increase the DOF which reduces “focus issues” as the result of the variations and decreases the amount of fall of (Vignetting).From the manufacturer Sigma 18-35mm F1.8 DC HSM | A Lens The first and fastest of its kind Truly a revolutionary product, the Sigma 18-35mm 1.8 DC HSM is the first wide-angle to standard zoom lens to achieve a large aperture of 1.8. Designed specifically for APS-C sized sensors, the Sigma 18-35mm 1.8 translates to 27mm-52.5mm on 35mm camera. Tapping into Sigma’s long history of lens innovations, the 18-35mm 1.8 DC HSM incorporates a wide glass molded aspherical lens with Special Low Dispersion (SLD) glass to compensate for aberrations and curvature at the widest angle. Internal focusing and zooming allows for more usability and functionality. The 18-35mm is ideal for landscapes, portraits, still life, snap shots, casual, and close-ups and the Hyper Sonic Motor (HSM) ensures smooth, fast and accurate autofocusing. The use of Thermally Composite Material (TSC) reduces size and weight but increases the lens durability. Its new Global Vision design works with its compatibility with the Sigma USB dock for further customization. A 9 blade rounded diaphragm also creates beautiful background blur. The Sigma 18-35mm 1.8 DC HSM is a new benchmark in photographic history and a must have for every camera bag. USB Dock Compatibility Sigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus. About Sigma Since 1961, and with the recent introduction of Sigma Global Vision, we have worked toward one single, simple goal: To hold ourselves to the highest standard of design & manufacturing of imaging products. Photography is all we do. And it’s all we’ve done. So you can rest assured that it’s something we know extensively and care deeply about. You have a vision. We’ve made it our mission. Great for video production. See below for a video made with the 18-35mm! Unique. fast constant aperture zoom lens Front & rear lens caps and lens hood is included with the lens. Read more Read more 

title: Sigma 340306 35 mm / F 1,4 DG HSM - Objetivo para Nikon (distancia focal fija 35mm, apertura f/1.4-16) color negro
text: Descripción del producto Accesorios incluidos:Parasol, tapa antipolvo, tapa para objetivo, estuche para lente, Tamaño del filtro:67 mm, Revestimiento antirreflejante de la lente:Recubrimiento multicapa superior, Hojas del diafragma:9, Distancia focal:35 mm, Pensado para:SLR de 35 mm, SLR digital, Construcción de la lente:11 grupo(s) / 13 elemento(s), Ajuste de foco:Automático, manual, Características:Sistema de foco interno, sistema flotante, motor hipersónico (HSM), lente de forma esférica imperfecta, cristal SLD (baja dispersión especial), Cristal FLF, admite anclaje USB Sigma, Apertura de la lente:F/1.4, Apertura mínima:F/16, Ampliación:1 / 5.2, Tipo de montaje:Nikon F, Ángulo de visión máx.:63.4 grados, Distancia de enfoque mín.:30 cm, Tipo:Lente Descripción del producto Accesorios incluidos:Parasol, tapa antipolvo, tapa para objetivo, estuche para lente, Tamaño del filtro:67 mm, Revestimiento antirreflejante de la lente:Recubrimiento multicapa superior, Hojas del diafragma:9, Distancia focal:35 mm, Pensado para:SLR de 35 mm, SLR digital, Construcción de la lente:11 grupo(s) / 13 elemento(s), Ajuste de foco:Automático, manual, Características:Sistema de foco interno, sistema flotante, motor hipersónico (HSM), lente de forma esférica imperfecta, cristal SLD (baja dispersión especial), Cristal FLF, admite anclaje USB Sigma, Apertura de la lente:F/1.4, Apertura mínima:F/16, Ampliación:1 / 5.2, Tipo de montaje:Nikon F, Ángulo de visión máx.:63.4 grados, Distancia de enfoque mín.:30 cm, Tipo:LenteMás información del producto SIGMA Ideal para fotografía de estudio, ofrece un amplio margen de expresión en la captura de arquitectura, el cielo estrellado, tomas bajo el agua y muchas otras escenas. La definición perfecta del concepto de la serie Arte, el 35mm F1.4 DG HSM es nuestro buque insignia. Manténgalo en sus propias manos y aprécielo con sus propios ojos Leer más Un verdadero buque insignia de la expresión artística Un objetivo gran angular de gran apertura F1.4 con una impresionante calidad de imagen. Un verdadero buque insignia de la expresión artística. Leer más 

title: Sigma 258306 105mm F2.8 EX DG OS HSM Macro Lens for Nikon DSLR Camera
text: Product Description Product Description The Sigma 105mm f/2.8 EX DG OS HSM Macro Lens for Nikon DSLR Cameras offers advanced performance of close-up photography. The OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigma's APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image. From the Manufacturer High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma's APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds. No Super Multi-Layer Coating (left). With Super Multi-Layer Coating (right). High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast. No Optical Stabilizer (top). With Optical Stabilizer (bottom). Handheld photography with ease Sigma's OS (Optical Stabilizer) system offers effective correction of approximately 4 stops. As the stabilization effect is visible through the viewfinder, it aids composition and accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use. Hyper Sonic Motor Quiet and speedy AF HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM provides quiet and high speed AF. It is also possible to use full-time manual focus, even if the lens is set to autofocus. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. Lens Construction In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience. Specifications Lens Construction 16 Elements in 11 Groups Angle of View 23.3 degrees Number of Diaphragm Blades 9 Blades (Rounded diaphragm) Minimum Aperture F22 Minimum Focusing Distance 31.2cm / 12.3in. Maximum Magnification 1:1 Filter Size Diameter 62mm Dimensions Diameter 78.3mm x Length 126.4mm / 3.1in. x 5.0in. Weight 725g / 25.6oz. MTF Chart MTF (Modular Transfer Function) is one of the measurements that evaluates a lens' performance, and it contrasts sensitivity at different spacial frequencies. The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis. The readings at 10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open. Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets. Distortion effective distortion: When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. the red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account. relative distortion: In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of the distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height. Extent of distortion: D[%]=(Y-Y0/Y0)x100 When you take the picture of a square object, if the distortion amount show a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (pincushi on distortion). When the distortion value is close to 0, the appearance of distortion is very minimal. Vignetting The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of the image will be darker (vignetting). Product Description Product Description The Sigma 105mm f/2.8 EX DG OS HSM Macro Lens for Nikon DSLR Cameras offers advanced performance of close-up photography. The OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigma's APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image. From the Manufacturer High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma's APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds. No Super Multi-Layer Coating (left). With Super Multi-Layer Coating (right). High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast. No Optical Stabilizer (top). With Optical Stabilizer (bottom). Handheld photography with ease Sigma's OS (Optical Stabilizer) system offers effective correction of approximately 4 stops. As the stabilization effect is visible through the viewfinder, it aids composition and accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use. Hyper Sonic Motor Quiet and speedy AF HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM provides quiet and high speed AF. It is also possible to use full-time manual focus, even if the lens is set to autofocus. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. Lens Construction In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience. Specifications Lens Construction 16 Elements in 11 Groups Angle of View 23.3 degrees Number of Diaphragm Blades 9 Blades (Rounded diaphragm) Minimum Aperture F22 Minimum Focusing Distance 31.2cm / 12.3in. Maximum Magnification 1:1 Filter Size Diameter 62mm Dimensions Diameter 78.3mm x Length 126.4mm / 3.1in. x 5.0in. Weight 725g / 25.6oz. MTF Chart MTF (Modular Transfer Function) is one of the measurements that evaluates a lens' performance, and it contrasts sensitivity at different spacial frequencies. The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis. The readings at 10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open. Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets. Distortion effective distortion: When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. the red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account. relative distortion: In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of the distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height. Extent of distortion: D[%]=(Y-Y0/Y0)x100 When you take the picture of a square object, if the distortion amount show a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (pincushi on distortion). When the distortion value is close to 0, the appearance of distortion is very minimal. Vignetting The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of the image will be darker (vignetting).

title: Sigma 105mm F2.8 EX DG OS HSM Macro Lens for Canon SLR Camera
text: Product Description Product Description The Sigma 105mm f/2.8 EX DG OS HSM Macro Lens for Canon EOS DSLR Cameras offers advanced performance of close-up photography. The OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigma's APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image. From the Manufacturer High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma's APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds. No Super Multi-Layer Coating (left). With Super Multi-Layer Coating (right). High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast. No Optical Stabilizer (top). With Optical Stabilizer (bottom). Handheld photography with ease Sigma's OS (Optical Stabilizer) system offers effective correction of approximately 4 stops. As the stabilization effect is visible through the viewfinder, it aids composition and accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use. Hyper Sonic Motor Quiet and speedy AF HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM provides quiet and high speed AF. It is also possible to use full-time manual focus, even if the lens is set to autofocus. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. Lens Construction In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience. Specifications Lens Construction 16 Elements in 11 Groups Angle of View 23.3 degrees Number of Diaphragm Blades 9 Blades (Rounded diaphragm) Minimum Aperture F22 Minimum Focusing Distance 31.2cm / 12.3in. Maximum Magnification 1:1 Filter Size Diameter 62mm Dimensions Diameter 78.3mm x Length 126.4mm / 3.1in. x 5.0in. Weight 725g / 25.6oz. MTF Chart MTF (Modular Transfer Function) is one of the measurements that evaluates a lens' performance, and it contrasts sensitivity at different spacial frequencies. The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis. The readings at 10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open. Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets. Distortion effective distortion: When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. the red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account. relative distortion: In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of the distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height. Extent of distortion: D[%]=(Y-Y0/Y0)x100 When you take the picture of a square object, if the distortion amount show a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (pincushi on distortion). When the distortion value is close to 0, the appearance of distortion is very minimal. Vignetting The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of the image will be darker (vignetting). Product Description Product Description The Sigma 105mm f/2.8 EX DG OS HSM Macro Lens for Canon EOS DSLR Cameras offers advanced performance of close-up photography. The OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigma's APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image. From the Manufacturer High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma's APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds. No Super Multi-Layer Coating (left). With Super Multi-Layer Coating (right). High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast. No Optical Stabilizer (top). With Optical Stabilizer (bottom). Handheld photography with ease Sigma's OS (Optical Stabilizer) system offers effective correction of approximately 4 stops. As the stabilization effect is visible through the viewfinder, it aids composition and accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use. Hyper Sonic Motor Quiet and speedy AF HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM provides quiet and high speed AF. It is also possible to use full-time manual focus, even if the lens is set to autofocus. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. Lens Construction In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience. Specifications Lens Construction 16 Elements in 11 Groups Angle of View 23.3 degrees Number of Diaphragm Blades 9 Blades (Rounded diaphragm) Minimum Aperture F22 Minimum Focusing Distance 31.2cm / 12.3in. Maximum Magnification 1:1 Filter Size Diameter 62mm Dimensions Diameter 78.3mm x Length 126.4mm / 3.1in. x 5.0in. Weight 725g / 25.6oz. MTF Chart MTF (Modular Transfer Function) is one of the measurements that evaluates a lens' performance, and it contrasts sensitivity at different spacial frequencies. The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis. The readings at 10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open. Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets. Distortion effective distortion: When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. the red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account. relative distortion: In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of the distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height. Extent of distortion: D[%]=(Y-Y0/Y0)x100 When you take the picture of a square object, if the distortion amount show a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (pincushi on distortion). When the distortion value is close to 0, the appearance of distortion is very minimal. Vignetting The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of the image will be darker (vignetting).From the manufacturer Designed for your full format DSLR Macro lens compatible with APS-C enclosures Constant aperture of F2.8 Optical quality from full aperture 9-blade circular diaphragm for incredible softness Its HSM focus ensured by an ultra-sonic wavebeam allows autofocus fast and above all silent with manual stitch retouching without having to turn off the AF. MACRO 105mm F2.8 EX DG OS HSM A New Standard for Macro Photography Equipped with SIGMA OS optical stabilisation, this macro telephoto lens is capable of delivering images at a 1:1 reproduction ratio and incredibly sharp freehand. The low dispersion glass elements that make up the SIGMA MACRO 105mm F2.8 EX DG OS HSM perfectly correct different chromatic aberrations by limiting the scattering of light inside the lens. Read more 

title: SIGMA Wide-angle lens Art 0.9 inches (24 mm) F1.4 DG HSM
text: Product description 開放F値1.4。 別次元の描写性能で切り拓く大口径広角レンズの新たな地平。 Product description 開放F値1.4。 別次元の描写性能で切り拓く大口径広角レンズの新たな地平。