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  2. Photo print sizes - Wikipedia

    en.wikipedia.org/wiki/Photo_print_sizes

    The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R. 4D/6D is a newer size for most consumer ...

  3. Image resolution - Wikipedia

    en.wikipedia.org/wiki/Image_resolution

    The image would be a very low quality image (72ppi) if printed at about 28.5 inches wide, but a very good quality (300ppi) image if printed at about 7 inches wide. The number of photodiodes in a color digital camera image sensor is often a multiple of the number of pixels in the image it produces, because information from an array of color ...

  4. Crop factor - Wikipedia

    en.wikipedia.org/wiki/Crop_factor

    A 50 mm (focal length) lens on an APS-C image sensor format (crop factor 1.6) images a slightly smaller field of view than a 70 mm lens on a 35 mm sensor format camera (full frame sensor). A 80 mm lens (1.6 × 50 mm = 80 mm) with a full frame camera gives the same field of view as this 50 mm lens and APS-C sensor format combination produces.

  5. List of photographic film formats - Wikipedia

    en.wikipedia.org/wiki/List_of_photographic_film...

    8 × 11 mm 15 circular sheet of film attached to rigid carrier Half-frame: cartridge 1934, later than Present 18 × 24 mm 48 or 72 135 film in "half-frame" cameras Minox: cartridge 1938 Present 8 × 11 mm 15, 36 or 50 nominally 9.5 mm-wide stock (in reality 9.2–9.3 mm) Karat cartridge 1936 1963 Early AGFA cartridge for 35 mm film Rapid

  6. APS-C - Wikipedia

    en.wikipedia.org/wiki/APS-C

    Drawing showing the relative sizes of sensors used in most current digital cameras. Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System film negative in its C ("Classic") format, of 25.1×16.7 mm, an aspect ratio of 3:2 and Ø 30.15 mm field diameter.

  7. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    Lenses produced for 35 mm film cameras may mount well on the digital bodies, but the larger image circle of the 35 mm system lens allows unwanted light into the camera body, and the smaller size of the image sensor compared to 35 mm film format results in cropping of the image. This latter effect is known as field-of-view crop.

  8. Wide-angle lens - Wikipedia

    en.wikipedia.org/wiki/Wide-angle_lens

    [b] For the most part, the dimensions of these image sensors are similar to the APS-C image frame size, i.e., approximately 24 mm x 16 mm. Therefore, the angle of view for any given focal-length lens will be narrower than it would be in a full-frame camera because the smaller sensor "sees" less of the image projected by the lens.

  9. Ultra wide angle lens - Wikipedia

    en.wikipedia.org/wiki/Ultra_wide_angle_lens

    The term denotes a different range of lenses, relative to the size of the sensor in the camera in question. [1] For 1" any 9mm or shorter is considered ultra wide angle. For 4/3" any 10 mm or shorter lens is considered ultra wide angle. For APS-C any lens shorter than 15 mm. For 35mm film or full-frame sensor any lens shorter than 24 mm