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2. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras, a lens of a given focal length gives a narrower field of view in such cameras. Sensor size is often expressed as optical format in inches. Other measures are also used; see table of sensor formats and sizes below.

3. Full-frame DSLR - Wikipedia

   en.wikipedia.org/wiki/Full-frame_DSLR

   The edges are cropped off, which is equivalent to zooming in on the center section of the imaging area. The ratio of the size of the full-frame 35 mm format to the size of the smaller format is known as the "crop factor" or "focal-length multiplier", and is typically in the range 1.3–2.0 for non-full-frame digital SLRs.

4. 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 ...

5. Comparison of digital SLRs - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_digital_SLRs

   Sensor size Effective megapixels Lens mount Viewfinder coverage Metering zones Focus points Lowest ISO Highest ISO Cont. shtg LCD size Live view Movie mode Memory card Dimensions (mm) Weight (g) [1] Announced (date) Ref. Canon: 5D Mark IV: Full frame: 30.1 EF 100 252 61 50 102400 7 3.2 yes yes CF+SD: 150.7×116.4×75.9 890 Aug 2016: Canon: 1D X ...

6. List of motion picture film formats - Wikipedia

   en.wikipedia.org/wiki/List_of_motion_picture...

   Projection dimensions are the width and height of the projector aperture plate, and by extension the film frame area which is projected. The aperture plate always very slightly crops the frame. Projection lenses indicates whether spherical (normal) or anamorphic lenses are used on the projector, and if anamorphic lenses, what anamorphic power ...

7. 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.