To get the equivalent field of view of 50mm lens on a full frame camera, I need a 31.3mm lens when using an APS-C camera. It doesn't matter if you have a full frame lens or APS-C lens. For those that don't understand this last comment see this pic:
The E 11mm F1.8 is a compact large aperture, ultra-wide APS-C prime lens designed for vloggers and shooting video on the go. With a 35mm full-frame equivalent of 16.5mm, this lens delivers outstanding corner-to-corner resolution, gorgeous bokeh and fast, reliable AF for dramatic expression and stunning selfie-style content.

Re: Full Sensor 24mp vs Apsc 32.5 Help. In reply to Califmike33 • Apr 20, 2021. 1. While it may be a "wash" for images of a similar view in the wideangle, normal and short telephoto range once you start to get into the longer telephoto range the 32.5 MP crop will absolutely resolve far more than the 24 MP FF.

So, f2.1 on an aps c lens/sensor provides about as much light as f2.8 on a full frame lens/sensor, or f3.5 on medium format. That doesn't sound right, correct me if I'm wrong. The focal length of a lens is defined by the lens construction and the distance to the focal plane so the sensor size isn't a factor, only the mount.

Full-Frame: Best quality, many options of lenses, but also the most expensive and heavy. APS-C: Basically the middle ground in everything, but quite limited in terms of lenses. M4/3: Many lenses, light and portable, but the aspect ratio and quality are lacking a little. Since I will be carrying my camera in a backpack often when traveling, I

A lens designed for a full frame camera will project a circle that is wide enough that the rectangular full-frame sensor will fit inside that circle. An APS-C camera's sensor will also fit inside that circle, but it will take a correspondingly smaller portion of the image, because it's a smaller rectangle. Lenses designed specifically for APS-C . 826 552 891 628 210 816 494 955

full frame vs aps c lens conversion