Calculation. 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 Here's a table for the APS-C sensor in my Canon 30D (15mm x 22.5mm). To make one for your sensor, just find the diagonal using the Pythagorean method. Then calculate focal length FOV as a factor of your diagonal. Then find the 35mm full-frame focal lengths that most closely match those factors. An MFT sensor measures 17.3 (A) x 13 (B) mm, and its diagonal D MFT is 21.65 mm. By definition, the MFT sensor has a CF = D FF / D MFT = 2. In the same way we can calculate the CF for the most common sensor types: Full Frame: CF = 1. Canon APS-C: CF = 1.6. Nikon, Pentax, Sony and Sigma APS-C: CF = 1.5. 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. So, a both a 50mm lens and a DX 50mm lens, when put on a DX (APS-C 1.5x) camera give a field of view equivalent of a 75mm lens on a full-frame camera. If you want to see the world with your DX camera as you would with a 50mm lens on a full-frame camera, you need to get a 35mm lens (DX or non-DXdoesn't matter as long as it has a 35mm focal What this means is, an APS-C lens like the 55-300mm you have, will give a full image on the 16mm × 24mm sensor. But if you take the same lens and mount it on a Full Frame camera, you'll only get an image on the APS-C-sized portion of the sensor; the rest will be blacked out, or a very heavy vignette. That’s because the APS-C sensor has less than 40 percent of the surface area of a full-frame sensor or a 35mm film frame. To capture sprawling landscapes and towering skyscrapers, a full-frame camera lets you fit more of the scene into view than an APS-C crop sensor camera, when using the same lens. For example, fitted with a Canon EF series YES, you are correct. A photo taken with a 28mm lens on an APS-C will have the same level of distortion as a 40mm lens on a Full Frame camera provided you shoot the subject from the same distance. It is the distance from the subject that determines the facial “perspective” distortion, not the focal length. Grab the best of life. Despite its compact size and light weight, the a6400 delivers speedy performance and a range of fearues you'd expect from a full-frame model. Whether you're taking still shots or movies, creative compositions or everyday selfie shots, you'll enjoy beautiful images that you'll want to share, on the go. For example, according to DXO, the APS-C Nikon D7200’s dynamic range is 14.6EV, while the full frame Canon 5DS has a dynamic range of 12.4EV. Rather than dynamic range or bit-depth, the biggest practical difference between full frame, or APS-C or MFT for 360 panoramic shots is resolution. Resolution is important for panoramic photography c7wcppQ.