This instrument gives an equal focal size calculation when adapting lenses designed for cameras with an APS-C sensor to full-frame cameras, or vice-versa. The calculation is important as a result of APS-C sensors are smaller than full-frame sensors, successfully cropping the picture. For example, a 35mm lens on an APS-C digital camera (with a crop issue of 1.5x) yields a discipline of view equal to a 52.5mm lens on a full-frame digital camera.
Understanding the equal focal size is essential for photographers aiming to take care of a particular discipline of view when switching between digital camera techniques. It permits correct replica of photographs, guaranteeing constant picture composition and perspective. Traditionally, the necessity for this calculation arose with the rising recognition of digital cameras that includes various sensor sizes, demanding a technique for relating lens efficiency throughout totally different platforms.
