page_title: Fixed-focus lens
hierarchical_section_title: Fixed-focus lens
caption_attribution_description: This photo was taken using a Super-Multi-Coated MACRO-TAKUMAR/6x7 1:4/135 lens wide open. (camera depicted in photo is Kodak Duaflex IV) The Duaflex IV was an inexpensive fixed-focus medium-format camera made by Kodak between 1947-1960. It used type 620 format film. The styling is of a twin-lens reflex camera but the camera is fixed-focus - the viewing screen is for framing purposes only.
context_page_description: A photographic lens for which the focus is not adjustable is called a fixed-focus lens or sometimes focus-free. The focus is set at the time of lens design, and remains fixed. It is usually set to the hyperfocal distance, so that the depth of field ranges all the way down from half that distance to infinity, which is acceptable for most cameras used for capturing images of humans or objects larger than a meter.
  Rather than having a method of determining the correct focusing distance and setting the lens to that focal point, a fixed-focus lens relies on sufficient depth of field to produce acceptably sharp images. Most cameras with focus-free lenses also have a relatively small aperture, which increases the depth of field. Fixed-focus cameras with extended depth of field sometimes are known as full-focus cameras.
context_section_description: A photographic lens for which the focus is not adjustable is called a fixed-focus lens or sometimes focus-free. The focus is set at the time of lens design, and remains fixed. It is usually set to the hyperfocal distance, so that the depth of field ranges all the way down from half that distance to infinity, which is acceptable for most cameras used for capturing images of humans or objects larger than a meter.
  Rather than having a method of determining the correct focusing distance and setting the lens to that focal point, a fixed-focus lens relies on sufficient depth of field to produce acceptably sharp images. Most cameras with focus-free lenses also have a relatively small aperture, which increases the depth of field.  Fixed-focus cameras with extended depth of field (EDOF) sometimes are known as full-focus cameras.
caption: Mid-20th-century medium-format fixed-focus camera
exif: {}