AlaskaRick Loc: Santa Cruz California

It’s been a while since I bought new equipment entertaining buying a new body canon has been my brand of choice in the past wondering if all the old ef lenses can be adapted to the new mirrorless cameras?

Blenheim Orange Loc: Michigan

Welcome to UHH.

Yes, EF lenses can be adapted to R bodies.

Others will weigh in with more detailed answers.

User ID

Youre really adapting the R bodies to the old EF lenses. Not being rhetorically picky for no reason. It really does feel like the adapted R-type camera is your new "base station" for your existing collection of EF lenses, and you feel no need for new RF-type lenses. IOW it doesnt feel like *adapting* at all. Its just a new camera that does NOT require any new lenses to upgrade the user experience.

This is no conjecture. Its how I use my many EF lenses. Its now much easier and faster to view or focus my same old EF lenses. There are zero "issues" with EF lenses on R-bodies.

Mark Sturtevant Loc: Grand Blanc, MI

There are two forms of adapters. A more expensive form with a programmable dial, and a more basic form without that. You can buy the Canon model of either of these, or a cheaper off-brand model of them.

steve49 Loc: massachusetts

Having undergone this "transition" the answer is yes.
Simple and they work fine with a relatively inexpensive adaptor.
All the camera functions work as they did w the older camera.

Jimmy T Loc: Virginia

Welcome to UHH
Here are the adapters: https://www.bhphotovideo.com/c/search?Ntt=canon%20ef%20to%20rf%20adapter&N=0&InitialSearch=yes&sts=ps
Best Wishes,
JimmyT Sends

PoppieJ Loc: North Georgia

If you have all of the EF glass you need/want then with an adapter you are all set. If not fill the holes with RF lenses. You might find them to be better quality. Don’t make this move if you are expecting everything to be lighter. Kit for kit there is almost no weight difference

Architect1776 Loc: In my mind

I have had an R7 for about a year now.
I only have EF/EF-S lenses besides manual lenses.
All the EF/EF-S lenses work perfectly and I have a couple dating back to the original EF lenses that came out with the EOS system.
Canon made sure that your investment in lenses for the last 35 years or so are 100% compatible with the new mirrorless RF cameras. I got the control ring adapter as it makes my existing EF/EF-S have the same control ring features as the RF lenses.
Additionally you can now use all your R, FL and FD lenses with the proper adapter on RF cameras and have aperture priority auto and have focus peaking.
Bottom line is the RF cameras are extremely versatile with older glass and you AF lenses all function as well or better than they did before unlike another maker that abandoned about 75% of their lenses when they went mirrorless especially a majority of their original AF lenses fail to AF and the aperture ceases to be controlled by the camera.
So go get a R series Canon camera and don't worry as what you have will work without having to look at long convoluted compatibility charts.
Enjoy your camera when you get it.

AzPicLady Loc: Behind the camera!

When I bought my R3, I got the adapter that allows me to use my EF lenses. I don't have any EF-S lenses, so I don't know about them. But the EF lenses perform better with the R3 than with my 1DX!

bkr2 Loc: Hackettstown,New Jersey

I have R7 camera. I use adapter on all of my lens. Non canon lens to. I did fine that my fish eye lens was giving me a hard time,but changing in camera adjustments to fixed that. Fish eye was manual all the way. this is what I did. Change - release shutter without card to on,and release shutter W/O lens to on Fixed it. If you are a bird shooter
Think about the Canon R7 its great. This was shot with a 100 to 400mm Sigma lens at F/7 1/320 iso2500. it was
crop down to 25% of the original size.

Architect1776 Loc: In my mind

I would very strongly suggest to change release shutter w/o card back to NOT release shutter w/o card.
That will not affect using completely manual lenses (I have the R7 also and several manual lenses with no communication). The only setting needed is what you did is release shutter w/o lens and the R7 and other R cameras will function with manual lenses.

Mojaveflyer Loc: Denver, CO

I went to a Canon R and R7 this year and with adapters I've had no problems using my EF lenses. The adapters run about $100 each. I have one on each body so I don't have to fool around moving the adapters.

CHG_CANON Loc: the Windy City

All your Canon EF lenses work perfectly with any of the three Canon options for EF-RF adapters. The same for all your EF-S lenses. If you have third-party lenses with an EF mount, these should work just fine too, although Canon offers no 'guarantee' of the performance of these non-Canon lenses.

JBRIII

Two points:
One of the two, EFS types, I believe, results in a smaller image size, not made for full frame.
Two some older? non-Canon lenses only work in manual mode, camera (R) does not even see lens and must be set to work without lens present (menu setting).

CHG_CANON Loc: the Windy City

Canon makes cropped sensor mirrorless cameras. If that applies to our OP's situation, they'll work exactly the same as when used on a cropped DSLR, via the same EF-RF adapter.