Digital camera - wikipedia Digital camera `` Digicam '' redirects here. For the military camouflage method using micropatterns, see Digital camouflage. Front and back of Canon PowerShot A 95, a typical pocket - size digital camera Hasselblad 503CW with Ixpress V96C digital back, an example of a professional digital camera system Nikon D810 A digital camera or digicam is a camera that produces images that can be stored in digital memory, displayed on a screen and printed on physical media. Most cameras produced today are digital, and digital cameras are incorporated into many devices ranging from PDAs and mobile phones ( called camera phones ) to vehicles. Digital and movie cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The diaphragm and shutter admit the correct amount of light to the imager, just as with film but the image pickup device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory. Many digital cameras can also record moving videos with sound. Some digital cameras can crop and stitch pictures and perform other elementary image editing. Contents 1 History 2 Image sensors 2.1 Sensor resolution 2.2 Image sharpness 2.3 Methods of image capture 2.4 Filter mosaics, interpolation, and aliasing 2.5 Sensor size and angle of view 3 Types of digital cameras 3.1 Compacts 3.2 Rugged compacts 3.3 Action cameras 3.4 360 - degree cameras 3.5 Bridge cameras 3.6 Mirrorless interchangeable - lens cameras 3.7 Modular cameras 3.8 Digital single - lens reflex cameras 3.9 Digital Single Lens Translucent ( DSLT ) cameras 3.10 Digital rangefinders 3.11 Line - scan camera systems 3.12 Stand alone camera 4 Integration into other devices 5 Market trends 6 Connectivity 6.1 Transferring photos 6.2 Printing photos 6.3 Displaying photos 7 Weather - sealing and waterproofing 8 Modes 9 Image data storage 9.1 File formats 10 Batteries 10.1 Proprietary 10.2 Standard consumer batteries 11 Conversion of film cameras to digital 11.1 Digital camera backs 12 See also 13 References 14 External links History Further information : History of the camera § Digital cameras, Digital single - lens reflex camera, and Camera phone The history of the digital camera began with Eugene F. Lally of the Jet Propulsion Laboratory, who was thinking about how to use a mosaic photosensor to capture digital images. His 1961 idea was to take pictures of the planets and stars while travelling through space to give information about the astronauts ' position. As with Texas Instruments employee Willis Adcock 's filmless camera ( US patent 4,057,830 ) in 1972, the technology had yet to catch up with the concept. Steven Sasson as an engineer at Eastman Kodak invented and built the first electronic camera using a charge - coupled device image sensor in 1975. Earlier ones used a camera tube ; later ones digitized the signal. Early uses were mainly military and scientific ; followed by medical and news applications. In 1986, Japanese company Nikon introduced the first digital single - lens reflex ( DSLR ) camera, the Nikon SVC. In the mid-to - late 1990s, DSLR cameras became common among consumers. By the mid-2000s, DSLR cameras had largely replaced film cameras. In 2000, Sharp introduced the world 's first digital camera phone, the J - SH04 J - Phone, in Japan. By the mid-2000s, higher - end cell phones had an integrated digital camera. By the beginning of the 2010s, almost all smartphones had an integrated digital camera. Image sensors Further information : Image sensor The two major types of digital image sensor are CCD and CMOS. A CCD sensor has one amplifier for all the pixels, while each pixel in a CMOS active - pixel sensor has its own amplifier. Compared to CCDs, CMOS sensors use less power. Cameras with a small sensor use a back - side - illuminated CMOS ( BSI - CMOS ) sensor. Overall final image quality is more dependent on the image processing capability of the camera, than on sensor type. Sensor resolution The resolution of a digital camera is often limited by the image sensor that turns light into discrete signals. The brighter the image at a given point on the sensor, the larger the value that is read for that pixel. Depending on the physical structure of the sensor, a color filter array may be used, which requires demosaicing to recreate a full - color image. The number of pixels in the sensor determines the camera 's `` pixel count ''. In a typical sensor, the pixel count is the product of the number of rows and the number of columns. For example, a 1,000 by 1,000 pixel sensor would have 1,000,000 pixels, or 1 megapixel. Image at left has a higher pixel count than the one to the right, but has lower spatial resolution. Image sharpness Final quality of an image depends on all optical transformations in the chain of producing the image. Carl Zeiss points out at the weakest link in an optical chain determines the final image quality. In case of a digital camera, a simplistic way of expressing it is that the lens determines the maximum sharpness of the image while the image sensor determines the maximum resolution. The illustration on the right can be said to compare a lens with very poor sharpness on a camera with high resolution, to a lens with good sharpness on a camera with lower resolution. Methods of image capture At the heart of a digital camera is a CCD or a CMOS image sensor. Digital camera, partly disassembled. The lens assembly ( bottom right ) is partially removed, but the sensor ( top right ) still captures an image, as seen on the LCD screen ( bottom left ). Since the first digital backs were introduced, there have been three main methods of capturing the image, each based on the hardware configuration of the sensor and color filters. Single - shot capture systems use either one sensor chip with a Bayer filter mosaic, or three separate image sensors ( one each for the primary additive colors red, green, and blue ) which are exposed to the same image via a beam splitter ( see Three - CCD camera ). Multi-shot exposes the sensor to the image in a sequence of three or more openings of the lens aperture. There are several methods of application of the multi-shot technique. The most common originally was to use a single image sensor with three filters passed in front of the sensor in sequence to obtain the additive color information. Another multiple shot method is called Microscanning. This method uses a single sensor chip with a Bayer filter and physically moved the sensor on the focus plane of the lens to construct a higher resolution image than the native resolution of the chip. A third version combined the two methods without a Bayer filter on the chip. The third method is called scanning because the sensor moves across the focal plane much like the sensor of an image scanner. The linear or tri-linear sensors in scanning cameras utilize only a single line of photosensors, or three lines for the three colors. Scanning may be accomplished by moving the sensor ( for example, when using color co-site sampling ) or by rotating the whole camera. A digital rotating line camera offers images of very high total resolution. The choice of method for a given capture is determined largely by the subject matter. It is usually inappropriate to attempt to capture a subject that moves with anything but a single - shot system. However, the higher color fidelity and larger file sizes and resolutions available with multi-shot and scanning backs make them attractive for commercial photographers working with stationary subjects and large - format photographs. Improvements in single - shot cameras and image file processing at the beginning of the 21st century made single shot cameras almost completely dominant, even in high - end commercial photography. Filter mosaics, interpolation, and aliasing The Bayer arrangement of color filters on the pixel array of an image sensor. Most current consumer digital cameras use a Bayer filter mosaic in combination with an optical anti-aliasing filter to reduce the aliasing due to the reduced sampling of the different primary - color images. A demosaicing algorithm is used to interpolate color information to create a full array of RGB image data. Cameras that use a beam - splitter single - shot 3CCD approach, three - filter multi-shot approach, color co-site sampling or Foveon X3 sensor do not use anti-aliasing filters, nor demosaicing. Firmware in the camera, or a software in a raw converter program such as Adobe Camera Raw, interprets the raw data from the sensor to obtain a full color image, because the RGB color model requires three intensity values for each pixel : one each for the red, green, and blue ( other color models, when used, also require three or more values per pixel ). A single sensor element can not simultaneously record these three intensities, and so a color filter array ( CFA ) must be used to selectively filter a particular color for each pixel. The Bayer filter pattern is a repeating 2x2 mosaic pattern of light filters, with green ones at opposite corners and red and blue in the other two positions. The high proportion of green takes advantage of properties of the human visual system, which determines brightness mostly from green and is far more sensitive to brightness than to hue or saturation. Sometimes a 4 - color filter pattern is used, often involving two different hues of green. This provides potentially more accurate color, but requires a slightly more complicated interpolation process. The color intensity values not captured for each pixel can be interpolated from the values of adjacent pixels which represent the color being calculated. Sensor size and angle of view Cameras with digital image sensors that are smaller than the typical 35mm film size have a smaller field or angle of view when used with a lens of the same focal length. This is because angle of view is a function of both focal length and the sensor or film size used. The crop factor is relative to the 35mm film format. If a smaller sensor is used, as in most digicams, the field of view is cropped by the sensor to smaller than the 35mm full - frame format 's field of view. This narrowing of the field of view may be described as crop factor, a factor by which a longer focal length lens would be needed to get the same field of view on a 35mm film camera. Full - frame digital SLRs utilize a sensor of the same size as a frame of 35mm film. Common values for field of view crop in DSLRs using active pixel sensors include 1.3 x for some Canon ( APS - H ) sensors, 1.5 x for Sony APS - C sensors used by Nikon, Pentax and Konica Minolta and for Fujifilm sensors, 1.6 ( APS - C ) for most Canon sensors, ~ 1.7 x for Sigma 's Foveon sensors and 2x for Kodak and Panasonic 4 / 3 - inch sensors currently used by Olympus and Panasonic. Crop factors for non-SLR consumer compact and bridge cameras are larger, frequently 4x or more. Further information : Image sensor format Relative sizes of sensors used in most current digital cameras. Table of sensor sizes Type Width ( mm ) Height ( mm ) Size ( mm2 ) 1 / 3.6 '' 4.00 3.00 12.0 1 / 3.2 '' 4.54 3.42 15.5 1 / 3 '' 4.80 3.60 17.3 1 / 2.7 '' 5.37 4.04 21.7 1 / 2.5 '' 5.76 4.29 24.7 1 / 2.3 '' 6.16 4.62 28.5 1 / 2 '' 6.40 4.80 30.7 1 / 1.8 '' 7.18 5.32 38.2 1 / 1.7 '' 7.60 5.70 43.3 2 / 3 '' 8.80 6.60 58.1 1 '' 12.8 9.6 123 4 / 3 '' 18.0 13.5 243 APS - C 25.1 16.7 419 35 mm 36 24 864 Back 48 36 1728 Types of digital cameras Digital cameras come in a wide range of sizes, prices and capabilities. In addition to general purpose digital cameras, specialized cameras including multispectral imaging equipment and astrographs are used for scientific, military, medical and other special purposes. Compacts Subcompact with lens assembly retracted Disassembled compact digital camera Compact cameras are intended to be portable ( pocketable ) and are particularly suitable for casual `` snapshots ''. Many incorporate a retractable lens assembly that provides optical zoom. In most models, an auto actuating lens cover protects the lens from elements. Most ruggedized or water - resistant models do not retract, and most with ( superzoom ) capability do not retract fully. Compact cameras are usually designed to be easy to use. Almost all include an automatic mode, or `` auto mode '', which automatically makes all camera settings for the user. Some also have manual controls. Compact digital cameras typically contain a small sensor which trades - off picture quality for compactness and simplicity ; images can usually only be stored using lossy compression ( JPEG ). Most have a built - in flash usually of low power, sufficient for nearby subjects. A few high end compact digital cameras have a hotshoe for connecting to an external flash. Live preview is almost always used to frame the photo on an integrated LCD. In addition to being able to take still photographs almost all compact cameras have the ability to record video. Compacts often have macro capability and zoom lenses, but the zoom range ( up to 30x ) is generally enough for candid photography but less than is available on bridge cameras ( more than 60x ), or the interchangeable lenses of DSLR cameras available at a much higher cost. Autofocus systems in compact digital cameras generally are based on a contrast - detection methodology using the image data from the live preview feed of the main imager. Some compact digital cameras use a hybrid autofocus system similar to what is commonly available on DSLRs. Some high end travel compact cameras have 30x optical zoom have full manual control with lens ring, electronic viewfinder, Hybrid Optical Image Stabilization, built - in flash, Full HD 60p, RAW, burst shooting up to 10fps, built - in Wi - Fi with NFC and GPS altogether. Typically, compact digital cameras incorporate a nearly silent leaf shutter into the lens but play a simulated camera sound for skeuomorphic purposes. For low cost and small size, these cameras typically use image sensor formats with a diagonal between 6 and 11 mm, corresponding to a crop factor between 7 and 4. This gives them weaker low - light performance, greater depth of field, generally closer focusing ability, and smaller components than cameras using larger sensors. Some cameras use a larger sensor including, at the high end, a pricey full - frame sensor compact camera, such as Sony Cyber-shot DSC - RX1, but have capability near that of a DSLR. A variety of additional features are available depending on the model of the camera. Such features include ones such as GPS, compass, barometer and altimeter for above mean sea level or under ( water ) mean sea level. and some are rugged and waterproof. Starting in 2011, some compact digital cameras can take 3D still photos. These 3D compact stereo cameras can capture 3D panoramic photos with dual lens or even single lens for play back on a 3D TV. In 2013, Sony released two add - on camera models without display, to be used with a smartphone or tablet, controlled by a mobile application via WiFi. Rugged compacts Rugged compact cameras typically include protection against submersion, hot and cold conditions, shock and pressure. Terms used to describe such properties include waterproof, freezeproof, heatproof, shockproof and crushproof, respectively. Nearly all major camera manufacturers have at least one product in this category. Some are waterproof to a considerable depth up to 82 feet ( 27 m ) ; others only 10 feet ( 3m ), but only a few will float. Ruggeds often lack some of the features of ordinary compact camera, but they have video capability and the majority can record sound. Most have image stabilization and built - in flash. Touchscreen LCD and GPS do not work under water. Action cameras For more details on this topic, see Action camera. GoPro and other brands offer action cameras which are rugged, small and can be easily attached to helmet, arm, bicycle, etc. Most have wide angle and fixed focus, and can take still pictures and video, typically with sound. The rising popularity of action cameras is in line with many people desiring to share photos or videos in social media. Many competitive manufacturers of action cameras results in many options and lowered, competitive prices, and nowadays, cameras are sold bundled with waterproof housings, accessories, and mountings compatible with the popular GoPro. 360 - degree cameras The 360 - degree camera can take picture or video 360 degrees using two lenses back - to - back and shooting at the same time. Some of the cameras are Ricoh Theta S, Nikon Keymission 360 and Samsung Gear 360. Nico360 was launched in 2016 and claimed as the world 's smallest 360 - degree camera with size 46 x 46 x 28 mm ( 1.8 x 1.8 x 1.1 in ) and price less than $200. With virtual reality mode built - in stitching, Wifi, and Bluetooth, live streaming can be done. Due to it also being water resistant, the Nico360 can be used as action camera. There are tend that action cameras have capabilities to shoot 360 degrees with at least 4K resolution. Bridge cameras Sony DSC - H2 Main article : Bridge camera Bridge cameras physically resemble DSLRs, and are sometimes called DSLR - shape or DSLR - like. They provide some similar features but, like compacts, they use a fixed lens and a small sensor. Some compact cameras have also PSAM mode. Most use live preview to frame the image. Their usual autofocus is by the same contrast - detect mechanism as compacts, but many bridge cameras have a manual focus mode and some have a separate focus ring for greater control. Big physical size and small sensor allow superzoom and wide aperture. Bridgcams generally include an image stabilization system to enable longer handheld exposures, sometimes better than DSLR for low light condition. As of 2014, bridge cameras come in two principal classes in terms of sensor size, firstly the more traditional 1 / 2.3 '' sensor ( as measured by image sensor format ) which gives more flexibility in lens design and allows for handholdable zoom from 20 to 24mm ( 35mm equivalent ) wide angle all the way up to over 1000 mm supertele, and secondly a 1 '' sensor that allows better image quality particularly in low light ( higher ISO ) but puts greater constraints on lens design, resulting in zoom lenses that stop at 200mm ( constant aperture, e.g. Sony RX10 ) or 400mm ( variable aperture, e.g. Panasonic Lumix FZ1000 ) equivalent, corresponding to an optical zoom factor of roughly 10 to 15. Some bridge cameras have a lens thread to attach accessories such as wide - angle or telephoto converters as well as filters such as UV or Circular Polarizing filter and lens hoods. The scene is composed by viewing the display or the electronic viewfinder ( EVF ). Most have a slightly longer shutter lag than a DSLR. Many of these cameras can store images in a raw format in addition to supporting JPEG. The majority have a built - in flash, but only a few have a hotshoe. In bright sun, the quality difference between a good compact camera and a digital SLR is minimal but bridge cameras are more portable, cost less and have a greater zoom ability. Thus a bridge camera may better suit outdoor daytime activities, except when seeking professional - quality photos. Mirrorless interchangeable - lens cameras Olympus OM - D E-M1 Mark II introduced 2016 Main article : Mirrorless interchangeable - lens camera In late 2008, a new type of camera emerged called mirrorless interchangeable - lens camera ( MILC ), which uses various sensors and offers lens interchangeability. These are simpler and more compact than DSLRs due to not having a lens reflex system. MILC camera models are available with various sensor sizes including : a small 1 / 2.3 inch sensor, as is commonly used in bridge cameras such as the original Pentax Q ( more recent Pentax Q versions have a slightly larger 1 / 1.7 inch sensor ) ; a 1 - inch sensor ; a Micro Four Thirds sensor ; an APS - C sensor such as the Sony NEX series, Fujifilm X series, Pentax K - 01, and Canon EOS M ; and some, such as the Sony α7, use a full frame ( 35 mm ) sensor and even Hasselblad X1D is the first medium format MILC. Disadvantage of MILC over DSLR is battery energy consume due to high energy consume of electronic viewfinder. Olympus and Panasonic released many Micro Four Thirds cameras with interchangeable lenses which are fully compatible each other without any adapter, while the others have proprietary mounts. In 2014, Kodak released its first Micro Four Third system camera. As of March 2014, MILC cameras are available which appeal to both amateurs and professionals. Modular cameras While most digital cameras with interchangeable lenses feature a lens - mount of some kind, there are also a number of modular cameras, where the shutter and sensor are incorporated into the lens module. The first such modular camera was the Minolta Dimâge V in 1996, followed by the Minolta Dimâge EX 1500 in 1998 and the Minolta MetaFlash 3D 1500 in 1999. In 2009, Ricoh released the Ricoh GXR modular camera. At CES 2013, Sakar International announced the Polaroid iM1836, an 18 MP camera with 1 `` - sensor with interchangeable sensor - lens. An adapter for Micro Four Thirds, Nikon and K - mount lenses was planned to ship with the camera. There are also a number of add - on camera modules for smartphones called lens - style cameras ( lens camera ). They contain all components of a digital camera in a module, but lack a viewfinder, display and most of the controls. Instead they can be mounted to a smartphone and use its display and controls. Lens - style cameras include : Sony SmartShot QX series, announced and released in mid 2013. In January 2014 announced a firmware update for Cyber-shot SmartShot DSC - QX10 and DSC - QX100. In September 2014, Sony announced the Cyber-shot SmartShot DSC - QX30 as well as the α SmartShot ILCE - QX1, the latter with E-mount instead of a built - in lens. Kodak PixPro smart lens camera series, announced in 2014. Vivicam smart lens camera series from Vivitar / Sakar, announced in 2014. Olympus Air lens camera, announced in 2014 and released in 2015, the lens camera is open platform using Android ( operating system ) and can detach into 2 parts ( sensor part and lens part ) and all Micro Four Thirds System lenses can be attached to sensor part of the lens camera. Digital single - lens reflex cameras Cutaway of an Olympus E-30 DSLR Main article : Digital single - lens reflex camera Digital single - lens reflex cameras ( DSLR ) use a reflex mirror that can reflect the light and also can swivel from one position to another position and back to initial position. By default, the reflex mirror is set 45 degree from horizontal, blocks the light to the sensor and reflects light from the lens to penta - mirror / prism at the DSLR camera and after some reflections arrives at the viewfinder. The reflex mirror is pulled out horizontally below the penta - mirror / prism when shutter release is fully pressed, so the viewfinder will be dark and the light / image can directly strike the sensor at the time of exposure ( speed setting ). Autofocus is accomplished using sensors in the mirror box. Some DSLRs have a `` live view '' mode that allows framing using the screen with image from the sensor. These cameras have much larger sensors than the other types, typically 18 mm to 36 mm on the diagonal ( crop factor 2, 1.6, or 1 ). The larger sensor permits more light to be received by each pixel ; this, combined with the relatively large lenses provides superior low - light performance. For the same field of view and the same aperture, a larger sensor gives shallower focus. They use interchangeable lenses for versatility. Usually some lenses are made for digital SLR use only, but recent trend the lenses can also be used in detachable lens video camera with or without adapter. Digital single lens translucent ( DSLT ) cameras Main article : Sony SLT camera A DSLT uses a fixed translucent mirror instead of a moving reflex mirror as in DSLR. A translucent mirror or transmissive mirror or semi-transparent mirror is a mirror which reflects the light to two things at the same time. It reflects it along the path to a pentaprism / pentamirror which then goes to an optical view finder ( OVF ) as is done with a reflex mirror in DSLR cameras. The translucent mirror also sends light along a second path to the sensor. The total amount of light is not changed, just some of the light travels one path and some of it travels the other. The consequences are that DSLT cameras should shoot a half stop differently from DSL. One advantage of using a DSLT camera is the blind moments a DSLR user experiences while the reflecting mirror is moved to send the light to the sensor instead of the viewfinder do not exist for DSLT cameras. Because there is no time at which light is not traveling along both paths, DSLT cameras get the benefit of continuous auto - focus tracking. This is especially beneficial for burst mode shooting in low - light conditions and also for tracking when taking video. Until early 2014, only Sony had released DSLT cameras. By March 2014, Sony had released more DSLTs than DSLRs with a relatively complete lenses line - up. Digital rangefinders Main article : Rangefinder camera § Digital rangefinder A rangefinder is a device to measure subject distance, with the intent to adjust the focus of a camera 's objective lens accordingly ( open - loop controller ). The rangefinder and lens focusing mechanism may or may not be coupled. In common parlance, the term `` rangefinder camera '' is interpreted very narrowly to denote manual - focus cameras with a visually - read out optical rangefinder based on parallax. Most digital cameras achieve focus through analysis of the image captured by the objective lens and distance estimation, if it is provided at all, is only a byproduct of the focusing process ( closed - loop controller ). Line - scan camera systems A line - scan camera traditionally has a single row of pixel sensors, instead of a matrix of them. The lines are continuously fed to a computer that joins them to each other and makes an image. This is most commonly done by connecting the camera output to a frame grabber which resides in a PCI slot of an industrial computer. The frame grabber acts to buffer the image and sometimes provide some processing before delivering to the computer software for processing. Multiple rows of sensors may be used to make colored images, or to increase sensitivity by TDI ( Time delay and integration ). Many industrial applications require a wide field of view. Traditionally maintaining consistent light over large 2D areas is quite difficult. With a line scan camera all that is necessary is to provide even illumination across the `` line '' currently being viewed by the camera. This makes possible sharp pictures of objects that pass the camera at high speed. Such cameras are also commonly used to make photo finishes, to determine the winner when multiple competitors cross the finishing line at nearly the same time. They can also be used as industrial instruments for analyzing fast processes. Linescan cameras are also extensively used in imaging from satellites ( see push broom scanner ). In this case the row of sensors is perpendicular to the direction of satellite motion. Linescan cameras are widely used in scanners. In this case, the camera moves horizontally. Further information : Rotating line camera Stand alone camera Stand alone cameras can be used as remote camera. One kind weighs 2.31 ounces, with a periscope shape, IPx7 water - resistance and dust - resistance rating and can be enhanced to IPx8 by using a cap. They have no viewfinder or LCD. Lens is a 146 degree wide angle or standard lens, with fixed focus. It can have a microphone and speaker, And it can take photos and video. As a remote camera, a phone app using Android or iOS is needed to send live video, change settings, take photos, or use time lapse. Integration into other devices Many devices have a built - in digital camera, including, for example, smartphones, mobile phones, PDAs and laptop computers. Built - in cameras generally store the images in the JPEG file format. Mobile phones incorporating digital cameras were introduced in Japan in 2001 by J - Phone. In 2003 camera phones outsold stand - alone digital cameras, and in 2006 they outsold film and digital stand - alone cameras. Five billion camera phones were sold in five years, and by 2007 more than half of the installed base of all mobile phones were camera phones. Sales of separate cameras peaked in 2008. Market Trends Sale of smartphones compared to digital cameras 2009 - 2013 Sales of traditional digital cameras have declined due to the increasing use of smartphones for casual photography, which also enable easier manipulation and sharing of photos through the use of apps and web - based services. `` Bridge cameras '', in contrast, have held their ground with functionality that most smartphone cameras lack, such as optical zoom and other advanced features. DSLRs have also lost ground to Mirrorless interchangeable - lens camera ( MILC ) s offering the same sensor size in a smaller camera. A few expensive ones use a full - frame sensor as DSLR professional cameras. In response to the convenience and flexibility of smartphone cameras, some manufacturers produced `` smart '' digital cameras that combine features of traditional cameras with those of a smartphone. In 2012, Nikon and Samsung released the Coolpix S800c and Galaxy Camera, the first two digital cameras to run the Android operating system. Since this software platform is used in many smartphones, they can integrate with services ( such as e-mail attachments, social networks and photo sharing sites ) as smartphones do, and use other Android - compatible software as well. In an inversion, some phone makers have introduced smartphones with cameras designed to resemble traditional digital cameras. Nokia released the 808 PureView and Lumia 1020 in 2012 and 2013 ; the two devices respectively run the Symbian and Windows Phone operating systems, and both include a 41 - megapixel camera ( along with a camera grip attachment for the latter ). Similarly, Samsung introduced the Galaxy S4 Zoom, having a 16 - megapixel camera and 10x optical zoom, combining traits from the Galaxy S4 Mini with the Galaxy Camera. Furthermore, Panasonic Lumic DMC - CM1 is an Android KitKat 4.4 smartphone with 20MP, 1 '' sensor, the largest sensor for a smartphone ever, with Leica fixed lens equivalent of 28mm at F2. 8, can take RAW image and 4K video, has 21mm thickness. Light - field cameras were introduced in 2013 with one consumer product and several professional ones. After a big dip of sales in 2012, consumer digital camera sales declined again in 2013 by 36 percent. In 2011, compact digital cameras sold 10 million per month. In 2013, sales fell to about 4 million per month. DSLR and MILC sales also declined in 2013 by 10 -- 15 % after almost ten years of double digit growth. Worldwide unit sales of digital cameras is continuously declining from 148 million in 2011 to 58 million in 2015 and tends to decrease more in the following years. Film camera sold got the peak at 36.671 million units in 1997 and digital camera sold began in 1999. In 2008, film camera market was dead and digital camera sold got the peak by 121.463 million units in 2010. In 2002, cell phone with camera has been introduced and in 2003 the cell phone with camera sold 80 million units per year. In 2011 the cell phone with camera sold hundreds of millions per year, when digital camera sold initialized to decline. In 2015, digital camera sold is 35.395 million units or only less than a third of digital camera sold number in a peak and also slightly less than film camera sold number in a peak. Connectivity Transferring photos Many digital cameras can connect directly to a computer to transfer data : - Early cameras used the PC serial port. USB is now the most widely used method ( most cameras are viewable as USB mass storage ), though some have a FireWire port. Some cameras use USB PTP mode for connection instead of USB MSC ; some offer both modes. Other cameras use wireless connections, via Bluetooth or IEEE 802.11 Wi - Fi, such as the Kodak EasyShare One. Wi - Fi integrated Memory cards ( SDHC, SDXC ) can transmit stored images, video and other files to computers or smartphones. Mobile operating systems such as Android allow automatic upload and backup or sharing of images over Wi - Fi to photo sharing and cloud services. Cameras with integrated Wi - Fi or specific Wi - Fi adapters mostly allow camera control, especially shutter release, exposure control and more ( tethering ) from computer or smartphone apps additionally to the transfer of media data. Cameraphones and some high - end stand - alone digital cameras also use cellular networks to connect for sharing images. The most common standard on cellular networks is the MMS Multimedia Messaging Service, commonly called `` picture messaging ''. The second method with smartphones is to send a picture as an email attachment. Many old cameraphones, however, do not support email. A common alternative is the use of a card reader which may be capable of reading several types of storage media, as well as high speed transfer of data to the computer. Use of a card reader also avoids draining the camera battery during the download process. An external card reader allows convenient direct access to the images on a collection of storage media. But if only one storage card is in use, moving it back and forth between the camera and the reader can be inconvenient. Many computers have a card reader built in, at least for SD cards. Printing photos Many modern cameras support the PictBridge standard, which allows them to send data directly to a PictBridge - capable computer printer without the need for a computer. Wireless connectivity can also provide for printing photos without a cable connection. An instant - print camera, is a digital camera with a built - in printer. This confers a similar functionality as an instant camera which uses instant film to quickly generate a physical photograph. Such non-digital cameras were popularized by Polaroid in 1972. Displaying photos Many digital cameras include a video output port. Usually sVideo, it sends a standard - definition video signal to a television, allowing the user to show one picture at a time. Buttons or menus on the camera allow the user to select the photo, advance from one to another, or automatically send a `` slide show '' to the TV. HDMI has been adopted by many high - end digital camera makers, to show photos in their high - resolution quality on an HDTV. In January 2008, Silicon Image announced a new technology for sending video from mobile devices to a television in digital form. MHL sends pictures as a video stream, up to 1080p resolution, and is compatible with HDMI. Some DVD recorders and television sets can read memory cards used in cameras ; alternatively several types of flash card readers have TV output capability. Weather - sealing and waterproofing Cameras can be equipped with a varying amount of environmental sealing to provide protection against splashing water, moisture ( humidity and fog ), dust and sand, or complete waterproofness to a certain depth and for a certain duration. The latter is one of the approaches to allow underwater photography, the other approach being the use of waterproof housings. Many waterproof digital cameras are also shockproof and resistant to low temperatures. Modes Many digital cameras have preset modes for different applications. Within the constraints of correct exposure various parameters can be changed, including exposure, aperture, focusing, light metering, white balance, and equivalent sensitivity. For example, a portrait might use a wider aperture to render the background out of focus, and would seek out and focus on a human face rather than other image content. Image data storage A CompactFlash ( CF ) card, one of many media types used to store digital photographs Many camera phones and most stand alone digital cameras store image data in flash memory cards or other removable media. Most stand - alone cameras use SD format, while a few use CompactFlash or other types. In January 2012, a faster XQD card format was announced. In early 2014, some high end cameras have two hot - swapable memory slots. Photographers can swap one of the memory card with camera - on. Each memory slot can accept either Compact Flash or SD Card. All new Sony cameras also have two memory slots, one for its Memory Stick and one for SD Card, but not hot - swapable. A few cameras used other removable storage such as Microdrives ( very small hard disk drives ), CD single ( 185 MB ), and 3.5 '' floppy disks. Other unusual formats include : Onboard flash memory -- Cheap cameras and cameras secondary to the device 's main use ( such as a camera phone ) PC Card hard drives -- early professional cameras ( discontinued ) Thermal printer -- known only in one model of camera that printed images immediately rather than storing Mini CD ← Microdrive ( CF - II ) USB flash drive 3.5 '' floppy disks Sony 's Memory Stick Most manufacturers of digital cameras do not provide drivers and software to allow their cameras to work with Linux or other free software. Still, many cameras use the standard USB storage protocol, and are thus easily usable. Other cameras are supported by the gPhoto project. File formats Main article : Image file formats The Joint Photography Experts Group standard ( JPEG ) is the most common file format for storing image data. Other file types include Tagged Image File Format ( TIFF ) and various Raw image formats. Many cameras, especially high - end ones, support a raw image format. A raw image is the unprocessed set of pixel data directly from the camera 's sensor, often saved in a proprietary format. Adobe Systems has released the DNG format, a royalty - free raw image format used by at least 10 camera manufacturers. Raw files initially had to be processed in specialized image editing programs, but over time many mainstream editing programs, such as Google 's Picasa, have added support for raw images. Rendering to standard images from raw sensor data allows more flexibility in making major adjustments without losing image quality or retaking the picture. Formats for movies are AVI, DV, MPEG, MOV ( often containing motion JPEG ), WMV, and ASF ( basically the same as WMV ). Recent formats include MP4, which is based on the QuickTime format and uses newer compression algorithms to allow longer recording times in the same space. Other formats that are used in cameras ( but not for pictures ) are the Design Rule for Camera Format ( DCF ), an ISO specification, used in almost all camera since 1998, which defines an internal file structure and naming. Also used is the Digital Print Order Format ( DPOF ), which dictates what order images are to be printed in and how many copies. The DCF 1998 defines a logical file system with 8.3 filenames and makes the usage of either FAT12, FAT16, FAT32 or exFAT mandatory for its physical layer in order to maximize platform interoperability. Most cameras include Exif data that provides metadata about the picture. Exif data may include aperture, exposure time, focal length, date and time taken, and location. Batteries Digital cameras have become smaller over time, resulting in an ongoing need to develop a battery small enough to fit in the camera and yet able to power it for a reasonable length of time. Digital cameras utilize either proprietary or standard consumer batteries. As of March 2014, most cameras use proprietary lithium - ion batteries while some use standard AA batteries or primarily use a proprietary Lithium - ion rechargeable battery pack but have an optional AA battery holder available. Proprietary The most common class of battery used in digital cameras is proprietary battery formats. These are built to a manufacturer 's custom specifications. Almost all proprietary batteries are lithium - ion. In addition to being available from the OEM, aftermarket replacement batteries are commonly available for most camera models. Standard consumer batteries Main article : Commercial off - the - shelf Digital cameras that utilize off - the - shelf batteries are typically designed to be able to use both single - use disposable and rechargeable batteries, but not with both types in use at the same time. The most common off - the - shelf battery size used is AA. CR2, CR - V3 batteries, and AAA batteries are also used in some cameras. The CR2 and CR - V3 batteries are lithium based, intended for a single use. Rechargeable RCR - V3 lithium - ion batteries are also available as an alternative to non-rechargeable CR - V3 batteries. Some battery grips for DSLRs come with a separate holder to accommodate AA cells as an external power source. Conversion of film cameras to digital Digital single - lens reflex camera When digital cameras became common, many photographers asked whether their film cameras could be converted to digital. The answer was yes and no. For the majority of 35 mm film cameras the answer is no, the reworking and cost would be too great, especially as lenses have been evolving as well as cameras. For most a conversion to digital, to give enough space for the electronics and allow a liquid crystal display to preview, would require removing the back of the camera and replacing it with a custom built digital unit. Many early professional SLR cameras, such as the Kodak DCS series, were developed from 35 mm film cameras. The technology of the time, however, meant that rather than being digital `` backs '' the bodies of these cameras were mounted on large, bulky digital units, often bigger than the camera portion itself. These were factory built cameras, however, not aftermarket conversions. A notable exception is the Nikon E2 and Nikon E3, using additional optics to convert the 35mm format to a 2 / 3 CCD - sensor. A few 35 mm cameras have had digital camera backs made by their manufacturer, Leica being a notable example. Medium format and large format cameras ( those using film stock greater than 35 mm ), have a low unit production, and typical digital backs for them cost over $10,000. These cameras also tend to be highly modular, with handgrips, film backs, winders, and lenses available separately to fit various needs. The very large sensor these backs use leads to enormous image sizes. For example, Phase One 's P45 39 MP image back creates a single TIFF image of size up to 224.6 MB, and even greater pixel counts are available. Medium format digitals such as this are geared more towards studio and portrait photography than their smaller DSLR counterparts ; the ISO speed in particular tends to have a maximum of 400, versus 6400 for some DSLR cameras. ( Canon EOS - 1D Mark IV and Nikon D3S have ISO 12800 plus Hi - 3 ISO 102400 with the Canon EOS - 1Dx 's ISO of 204800 ) Digital camera backs Main article : digital camera back In the industrial and high - end professional photography market, some camera systems use modular ( removable ) image sensors. For example, some medium format SLR cameras, such as the Mamiya 645D series, allow installation of either a digital camera back or a traditional photographic film back. Area array CCD CMOS Linear array CCD ( monochrome ) 3 - strip CCD with color filters Linear array cameras are also called scan backs. Single - shot Multi-shot ( three - shot, usually ) Most earlier digital camera backs used linear array sensors, moving vertically to digitize the image. Many of them only capture grayscale images. The relatively long exposure times, in the range of seconds or even minutes generally limit scan backs to studio applications, where all aspects of the photographic scene are under the photographer 's control. Some other camera backs use CCD arrays similar to typical cameras. These are called single - shot backs. Since it is much easier to manufacture a high - quality linear CCD array with only thousands of pixels than a CCD matrix with millions, very high resolution linear CCD camera backs were available much earlier than their CCD matrix counterparts. For example, you could buy an ( albeit expensive ) camera back with over 7,000 pixel horizontal resolution in the mid-1990s. However, as of 2004, it is still difficult to buy a comparable CCD matrix camera of the same resolution. Rotating line cameras, with about 10,000 color pixels in its sensor line, are able, as of 2005, to capture about 120,000 lines during one full 360 degree rotation, thereby creating a single digital image of 1,200 Megapixels. Most modern digital camera backs use CCD or CMOS matrix sensors. The matrix sensor captures the entire image frame at once, instead of incrementing scanning the frame area through the prolonged exposure. For example, Phase One produces a 39 million pixel digital camera back with a 49.1 x 36.8 mm CCD in 2008. This CCD array is a little smaller than a frame of 120 film and much larger than a 35 mm frame ( 36 x 24 mm ). In comparison, consumer digital cameras use arrays ranging from 36 x 24 mm ( full frame on high end consumer DSLRs ) to 1.28 x 0.96 mm ( on camera phones ) CMOS sensor. 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The History of Digital Cameras Digital camera at Encyclopædia Britannica Photography Outline Terminology 35 mm equivalent focal length Angle of view Aperture Black and white Chromatic aberration Circle of confusion Color balance Color temperature Depth of field Depth of focus Exposure Exposure compensation Exposure value F - number Film format Large Medium Film speed Focal length Guide number Hyperfocal distance Metering mode Orb ( optics ) Perspective distortion Photograph Photographic printing Photographic processes Reciprocity Red - eye effect Science of photography Shutter speed Sync Zone System Genres Abstract Aerial Architectural Astrophotography Banquet Conceptual Conservation Cloudscape Documentary Ethnographic Erotic Fashion Fine - art Fire Forensic Glamour High - speed Landscape Lomography Nature Neues Sehen Nude Photojournalism Pornography Portrait Post-mortem Selfie Social documentary Sports Still life Stock Street Vernacular Underwater Wedding Wildlife Techniques Afocal Bokeh Brenizer Burst mode Contre - jour Cyanotype ETTR Fill flash Fireworks Harris shutter HDRI High - speed Holography Infrared Intentional camera movement Kirlian Kite aerial Long - exposure Macro Mordançage Multiple exposure Night Panning Panoramic Photogram Print toning Redscale Rephotography Rollout Scanography Schlieren photography Sabatier effect Stereoscopy Stopping down Strip Slit - scan Sun printing Tilt -- shift Miniature faking Time - lapse Ultraviolet Vignetting Xerography Composition Diagonal method Framing Headroom Lead room Rule of thirds Simplicity Equipment Camera light - field field instant pinhole press rangefinder SLR still TLR toy view Darkroom enlarger safelight Film base format holder stock Filter Flash beauty dish cucoloris gobo hood hot shoe monolight Reflector snoot Softbox Lens Wide - angle lens Zoom lens Telephoto lens Manufacturers Monopod Movie projector Slide projector Tripod head Zone plate History Timeline of photography technology Analog photography Autochrome Lumière Box camera Calotype Camera obscura Daguerreotype Dufaycolor Heliography Painted photography backdrops Photography and the law Glass plate Visual arts Digital photography Digital camera D - SLR comparison MILC camera back Digiscoping Digital versus film photography Film scanner Image sensor CMOS APS CCD Three - CCD camera Foveon X3 sensor Image sharing Pixel Color photography Color Print film Reversal film Color management color space primary color CMYK color model RGB color model Photographic processing Bleach bypass C - 41 process Cross processing Developer Digital image processing Dye coupler E-6 process Fixer Gelatin silver process Gum printing Instant film K - 14 process Print permanence Push processing Stop bath Lists Most expensive photographs Photographers Norwegian Polish street women Portal DSLR, SLT and MILC cameras with HD video ( uncompressed -- 4K resolution ) mode ( comparison ) Canon EOS High - end 5D Mark II ( 2008 ) 7D ( 2009 ) 1D Mark IV ( 2009 ) 1D X ( 2012 ) 5D Mark III ( 2012 ) 1D C ( 2012 ) 6D ( 2012 ) 7D Mark II ( 2014 ) 5Ds / 5DsR ( 2015 ) 1D X Mark II ( 2016 ) 5D Mark IV ( 2016 ) 6D Mark II ( 2017 ) Mid-range 500D ( 2009 ) 60D ( 2010 ) 550D ( 2010 ) 600D ( 2011 ) 650D ( 2012 ) M ( 2012 ) 700D ( 2013 ) 70D ( 2013 ) M2 ( 2013 ) 750D ( 2015 ) 760D ( 2015 ) M3 ( 2015 ) 80D ( 2016 ) M5 ( 2016 ) 800D ( 2017 ) 77D ( 2017 ) M6 ( 2017 ) 200D ( 2017 ) Entry - level 1100D ( 2011 ) 100D ( 2013 ) 1200D ( 2014 ) M10 ( 2015 ) 1300D ( 2016 ) M100 ( 2017 ) Nikon D / 1 series High - end D300S ( 2009 ) D3S ( 2009 ) D800 / D800E ( 2012 ) D4 ( 2012 ) D600 ( 2012 ) D610 ( 2013 ) D4S ( 2014 ) D810 ( 2014 ) D750 ( 2014 ) D810A ( 2015 ) D500 ( 2016 ) D5 ( 2016 ) D850 ( 2017 ) Mid-range D90 ( 2008 ) D5000 ( 2009 ) D7000 ( 2010 ) D5100 ( 2011 ) 1 V1 ( 2011 ) 1 V2 ( 2012 ) D5200 ( 2012 ) D7100 ( 2013 ) D5300 ( 2013 ) 1 V3 ( 2014 ) D5500 ( 2015 ) D7200 ( 2015 ) D5600 ( 2016 ) D7500 ( 2017 ) Entry - level D3100 ( 2010 ) 1 J1 ( 2011 ) D3200 ( 2012 ) 1 J2 ( 2012 ) 1 S1 ( 2013 ) 1 J3 ( 2013 ) 1 AW1 ( 2013 ) D3300 ( 2014 ) 1 J4 ( 2014 ) 1 J5 ( 2015 ) D3400 ( 2016 ) Olympus Micro 4 / 3 Mid-range E-M5 ( 2012 ) E-P5 ( 2013 ) E-M1 ( 2013 ) E-M10 ( 2014 ) PEN - F ( 2016 ) E-M1 Mark II ( 2016 ) E-M10 Mark III ( 2017 ) Entry - level E-PL1 ( 2010 ) E-P1 ( 2010 ) E-P2 ( 2010 ) E-PL2 ( 2011 ) E-PL3 ( 2011 ) E-P3 ( 2011 ) E-PM1 ( 2011 ) E-PL5 ( 2012 ) E-PM2 ( 2012 ) E-PL7 ( 2014 ) E-PL8 ( 2016 ) Panasonic Lumix Mid-range GH1 ( 2009 ) GH2 ( 2010 ) GH3 ( 2012 ) GX7 ( 2013 ) GM1 ( 2013 ) GH4 ( 2014 ) GH5 ( 2017 ) Entry - level GF1 ( 2009 ) G10 ( 2010 ) G2 ( 2010 ) GF2 ( 2010 ) G3 ( 2011 ) GX1 ( 2011 ) GF3 ( 2011 ) GF5 ( 2012 ) G5 ( 2012 ) G6 ( 2013 ) Pentax 645 / K / Q series High - end 645D ( 2010 ) 645Z ( 2014 ) K - 1 ( 2016 ) Mid-range K - 7 ( 2009 ) K - 5 ( 2010 ) K - 30 ( 2012 ) K - 5 II / K - 5 IIs ( 2012 ) K - 50 ( 2013 ) K - 3 ( 2013 ) K - 3 II ( 2015 ) K - 70 ( 2016 ) KP ( 2017 ) Entry - level K-x ( 2009 ) K-r ( 2010 ) Q ( 2011 ) K - 01 ( 2012 ) Q10 ( 2012 ) K - 500 ( 2013 ) Q7 ( 2013 ) Q - S1 ( 2014 ) Samsung NX series High - end NX1 ( 2014 ) Mid-range NX5 ( 2010 ) NX10 ( 2010 ) NX11 ( 2010 ) NX20 ( 2012 ) NX30 ( 2013 ) Galaxy NX ( 2013 ) NX500 ( 2015 ) Entry - level NX100 ( 2010 ) NX200 ( 2011 ) NX1000 ( 2012 ) NX210 ( 2012 ) NX300 ( 2013 ) NX1100 ( 2013 ) NX2000 ( 2013 ) Sony α High - end α99V / α99 ( 2012 ) α7 / α7R ( 2013 ) α7S ( 2014 ) α7II ( 2014 ) α7RII ( 2015 ) α7SII ( 2015 ) α99 II ( 2016 ) Mid-range α580 ( 2010 ) α560 ( 2010 ) α55V / α55 ( 2010 ) α77V / α77 ( 2011 ) NEX - 7 ( 2011 ) NEX - 6 ( 2011 ) α65V / α65 ( 2011 ) α57 ( 2012 ) α58 ( 2013 ) α6000 ( 2014 ) α77 II ( 2014 ) α6300 ( 2016 ) α6500 ( 2016 ) Entry - level NEX - 3 / NEX - 3C ( 2010 ) NEX - 5 / NEX - 5C ( 2010 ) α33 ( 2010 ) α35 ( 2011 ) NEX - 5N ( 2011 ) NEX - C3 ( 2011 ) NEX - F3 ( 2012 ) α37 ( 2012 ) NEX - 5R ( 2012 ) NEX - 5T ( 2013 ) α3000 ( 2013 ) α5000 ( 2014 ) Leica Fujifilm X / G High - end Leica M ( 2012 ) Leica S ( 2014 ) Leica SL ( 2015 ) Fujifilm X-Pro2 ( 2016 ) Fujifilm X-T2 ( 2016 ) Fujifilm GFX 50S ( 2017 ) Leica TL2 ( 2017 ) Mid-range Fujifilm X-Pro1 ( 2012 ) Fujifilm X-E1 ( 2012 ) Fujifilm X-E2 ( 2013 ) Fujifilm X-T1 ( 2014 ) Fujifilm X-T10 ( 2015 ) Fujifilm X-T20 ( 2017 ) Fujifilm X-E3 ( 2017 ) Entry - level Fujifilm X-M1 ( 2013 ) Fujifilm X-A1 ( 2013 ) Fujifilm X-A2 ( 2015 ) Fujifilm X-A3 ( 2016 ) Fujifilm X-A10 ( 2016 ) Hasselblad XCD / H High - end Hasselblad X1D - 50c ( 2016 ) H6X ( 2016 ) H6D - 50c ( 2016 ) H6D - 100c ( 2016 ) Timelapse Slow motion Fast fps HDR Panorama GPS ( opt. ) WiFi ( opt. ) Bluetooth GND : 4519830 - 5 NDL : 00904238 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Digital_camera&oldid=802357928 '' Categories : Digital cameras Cameras Digital photography American inventions Audiovisual introductions in 1975 1975 in arts 1975 in technology Computer - related introductions in 1975 Hidden categories : All articles that may contain original research Articles that may contain original research from August 2013 Articles containing potentially dated statements from March 2014 All articles containing potentially dated statements All articles with unsourced statements Articles with unsourced statements from March 2014 Articles with unsourced statements from August 2013 Articles containing potentially dated statements from 2004 Articles containing potentially dated statements from 2005 Wikipedia articles with GND identifiers Talk Contents About Wikipedia Afrikaans বাংলা Беларуская ( тарашкевіца ) ‎ Български Bosanski Català Čeština Dansk Deutsch Eesti Ελληνικά Español Esperanto Euskara فارسی Français Furlan Gaeilge 한국어 Հայերեն Hrvatski Bahasa Indonesia Íslenska Italiano עברית Қазақша ລາວ Magyar Македонски മലയാളം मराठी მარგალური Nederlands 日本 語 Norsk ਪੰਜਾਬੀ Polski Português Русский සිංහල Simple English Slovenčina Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska தமிழ் ไทย ᏣᎳᎩ Türkçe Українська Vèneto Tiếng Việt Winaray 吴语 粵語 中文 Edit links This page was last edited on 25 September 2017, at 17 : 32. 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Question: when did the first digital camera come out
Answer: 1975