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2. Open matte - Wikipedia

   en.wikipedia.org/wiki/Open_matte

   The movie projector then uses an aperture mask to soft matte the academy frame to the intended aspect ratio (1.85:1 or 1.66:1). When the 4:3 full-screen video master is created, many filmmakers may prefer to use the full Academy frame ("open matte") instead of creating a pan and scan version from within the 1.85 framing.

3. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   The common 1" outside diameter circular video camera tubes have a rectangular photo sensitive area about 16 mm on the diagonal, so a digital sensor with a 16 mm diagonal size is a 1" video tube equivalent. The name of a 1" digital sensor should more accurately be read as "one inch video camera tube equivalent" sensor.

4. Mat (picture framing) - Wikipedia

   en.wikipedia.org/wiki/Mat_(picture_framing)

   In the picture framing industry, a mat (or matte, or mount in British English) is a thin, flat piece of paper-based material included within a picture frame, which serves as additional decoration and to perform several other, more practical functions, such as separating the art from the glass.

5. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

6. Digital photo frame - Wikipedia

   en.wikipedia.org/wiki/Digital_photo_frame

   The aspect ratio of the frames can vary. Common aspect ratios include: 4:3, 3:2 and 16:9. (Sometimes 16:9 frames are actually 15:9) [7] Depending on the model and features, images which do not exactly fit the aspect ratio of the frame may be cropped, stretched, or shrunk to fit. This could result in, respectively, images that are missing ...

7. Half-frame camera - Wikipedia

   en.wikipedia.org/wiki/Half-frame_camera

   More recently, social media use has made some see the default portrait orientation as beneficial, particularly with Instagram changing from the 1:1 aspect ratio to 4:5 and 9:16 to fit more image on a mobile device. The 3:4 aspect ratio of half frame photos can easily be cropped to 4:5 in portrait orientation without a significant reduction in ...