So an APS-C DSLR has a crop factor of 1.5x1.6x meaning that it crops into the Full Frame image – using a 28 mm lens on an APS-C giving a view similar to a 45 mm lens on Full Frame. Field of View in Full frame vs. Crop Sensor Cameras [Includes photo comparison]. When photographers are interested in buying a full frame camera for the first By multiplying the lens focal length (or focal length range) by the FOVCF, you get the full-frame focal length lens subject framing equivalent when used at the same distance. For example, if you are looking for similar framing that a 50mm lens (the classic "normal" lens) provides on a full-frame (1.0x crop factor) SLR body, you probably want a But put that same 100mm lens on an APS-C body with a 1.6 crop factor and it frames the scene like a 1.6 × 100 mm lens (a 160mm lens) would have done on a full-frame. What’s happening is, the APSC sensor is smaller and only big enough to capture the middle bits of what’s projected by the lens, which quite possibly is the most distant stuff It just makes sense. For the same focused distance of 12 ft, the crop-sensor (left) has more DoF than the FF camera (right), with an equivalent focal length. Different focal length, same behavior. Shooting from the same spot, the full-frame camera gives us less DoF than the crop sensor, for an “equivalent” focal length. Top APS-C or older FF for weddings. TL;DR version: Top of the line APS-C equipment, or full-frame on a budget? I am just starting out as a wedding photographer. My current setup: Dual Sony a6000s, Sigma 16mm, 30mm, 56mm - all f1.4 (These are arguably the best lenses for Sony APS-C). I want to upgrade my bodies to the newer Sony APS-Cs to take The Focal Length of our lens is simply always what it says it is (zoom of course changes it to what zoom says it is.) The focal length choice is selected for the sensor size, but the physical lens cannot be modified by the sensor size present. A 50 mm f/1.8 lens on a full frame body is still the same 50 mm f/1.8 if on any smaller cropped body. The factor relating the 50mm focal length of the normal full frame lens and the 31.3mm of the equivalent normal APS-C lens is often called the "crop factor", sometimes the "digital multiplier". It's 1.6x for Canon EOS DSLRs and 1.5x for Nikon, Pentax and Sony (who have very slightly larger APS-C sensors). It doesn't actually multiply the focal O1tp6DS.