topic L Glass quality with RF adapter? in EF & RF Lenses

L Glass quality with RF adapter?

wfmiller — Tue, 23 Sep 2025 14:40:10 GMT

Purchased my first mirrorless camera, EOS R5 Mk ll. Also have the adapter to be able to use all my lenses that I have. Most of my glass is L and was wondering if anyone has seen any significant differences in using R glass vs L with adapter?

Re: Glass quality with adapter?

shadowsports — Mon, 15 Sep 2025 21:19:55 GMT

Greetings,

Your EF L Series lenses will work as well or better than they did on your DSLRs. It's important to use a Canon brand adapter, the standard or control ring.

RF glass gives you the following. Usually lighter weight, and a smaller footprint. A modest increase in focus acquisition speed (not in all cases) and the maximum FPS rated for your body. In some, but not all cases adapted EF lenses may not achieve the maximum possible frame rates.

EF lenses work very well, but RF lenses are designed to provide maximum performance for your mirrorless body.

Re: Glass quality with adapter?

jrhoffman75 — Mon, 15 Sep 2025 23:55:30 GMT

https://www.usa.canon.com/learning/training-articles/training-articles-list/still-using-a-dslr-consider-stepping-up-to-mirrorless-part-3?utm_source=promotional&utm_medium=email&utm_campaign=20250915_CAMERA_DSLR_STEPUP&riid=516391425&mi_u=516391425&mi_ecmp=20250915_CAMERA_DSLR_STEPUP