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Why we might never see Canon’s APS-C primes

Started 1 month ago | Discussions thread
drsnoopy Senior Member • Posts: 1,216
Re: Why we might never see Canon’s APS-C primes
5

gmcooper wrote:

How exactly does an RFs lens differ from an RF lens?

An RF-S lens is designed for the APS-C “1.6x crop” sensor, so it only has to cover the diameter of the smaller sensor, which is about 5/8ths the linear dimension or about 40% of the area of a full frame sensor. Thus the lens elements can be smaller and the whole lens proportionately smaller and lighter.

An RF-S lens can be used on a full frame camera, but it automatically switches the camera to crop mode, so that it doesn’t vignette.

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