EF Lens Compatibility with EOS R6 Mark II

[velazquezn36]

Hello,

I am looking to upgrade my Canon Rebel t3i DSLR camera to a Canon mirrorless R6 mk II, I have an older sense from when I invested in the Rebel t3i back in 2011/2012. My lenses are still good, and was wondering if the lenses back then are compatible with mirrorless cameras released now?

I read there was an adaptor needed for DSLR lenses to fit onto Mirrorless cameras, just wanting to know more about it, as I'm picking up the camera again after a little hiatus due to different jobs I've had.

Would like to know if I should keep this lense, or sell it with my other camera, and just order a new lense, any info would be greatly appreciated. Just want to know before I do anything.

[rs-eos]

While you can use EF-S lenses with R-series full frame cameras such as the EOS R6 II with an adapter, those lenses were designed for crop-sensor cameras and the camera would be put into crop mode.   Width and height are both reduced by a factor of 1.6 and thus your images would end up having 2.56 times less resolution.

For full-frame R-series cameras, it would be best to use RF lenses, or EF lenses via an EF to RF adapter.  And not EF-S or RF-S lenses since they would crop.

[velazquezn36]

Thank you for the reply! This clears it up for me!

[shadowsports · Accepted solution]

Greetings ,

EF and EF-S lenses can be used with a Canon R series mirrorless camera.  You will need a EOS R to EF adapter.

Note EF-S lenses intended for cameras with an APS-C sensor will behave differently when mounted on a full frame camera.  The camera will automatically switch to crop mode.  This may not be desirable as the overall resolution of your images will be affected.  For example, if you mount an APS-C lens on a full frame 24 MP R6 mkII, your images will be captured at 9.3 MP.  This is because the image circle in the APSC lens does not project an image to the edges of the full frame sensor in your camera.  Effectively reducing the resolution Your camera is able to capture.  In some cases this might not be a big deal, but is something you should be aware of.

APS-C Lenses:

I recommend that you sell these lenses and use this money to offset the new purchase

Ultimately you will want to invest in RF lenses intended for full frame.

[velazquezn36]

Thank you so much for the reply! This also helps clear up my mind for an investment! Thank you!

[ebiggs1]

If its possible when you buy a R6 Mk II you should buy and use RF lenses. That is always the best course of action.

The fact it may work on the new camera isn't a good reason to do it.

[Philnick]

Nothing wrong with using some of the ultra-sharp EF L lenses like the 24-70mm f2.8L II and the 200mm F2.8L II. Those traded off optical image stabilization for sharpness. Most recent full-frame R bodies other than the R8 have in-body image stabilization (IBIS) - your R6 II has it - making those lenses  full-function - and they're less expensive than the RF versions. I happily hand-hold them at low shutter speeds on my R7.

[Teacherbytes]

When I switched from an 80D to an R6 Mark II I kept my EF 70-300mm f4-5.6 USM II because I liked the images I could produce with it and I haven't justified the purchase of a new RF telephoto zoom lens at this time.