Sark17 Loc: Atlanta, GA

Hello! I’m brand new here and I love everything I’m learning by being a fly on the wall in the group! However, an upcoming trip to Africa has me in a little panic about my gear (I don’t even think I have the right to call it that yet but I will!). I’ve been extremely interested in photography and have loved taking photos my whole life, but I’m only decent at best (not that that stops me!).

My situation: I have a decade old Canon Rebel T2i with some pretty awesome lenses (most recently I’ve purchased the Canon EF 70-200 f/2.8L IS II and the Tamron SP 150-600 telephoto lens).

Well as you all know I’m sure, once you get started on research, then it’s hard to stop, so now I’m looking at whole camera upgrade with the Canon EOS R which would require a mount adapter to fit my existing EF lenses.

My question: if I upgrade for all of the new bells and whistles of the EOS R, would I see them all if using a mount adapter? Or do you need specific lenses for that specific camera to get the full benefit of the features? I imagine it’s the same, but didn’t know if the adapter inhibited some of its performance.

Thank you in advance for your help!

CHG_CANON Loc: the Windy City

There are compatibility issues with third-party lenses and the EF-EOS R adapter. Not every lens, not every time, but enough to be concerned and investigate your lens model in detail. For lenses where compatibility is maintained (all Canon EF & EF-S lenses), the auto-focus, as driven by the EOS R body, can be more accurate than an EOS DSLR body. At the minimum, the lens performance remains excellent. One example of a benefit is autofocus at f/11, such as a 2x extender with a 100-400L, something that is not support by any EOS DSLR. For your proposed upgrade, you'll also benefit from the improved resolution of the sensor, 18MP up to 30MP. While giving up the crop factor of the Rebel, you'll have improved high ISO performance and significantly more pixels to crop into while retaining large, high quality images.

scubadoc Loc: Sarasota, FL

I can’t speak to the Tamron, but the Canon lens should pass on all the information to the RF adaptor. I suspect the Tamron will as well.

Sark17 Loc: Atlanta, GA

Thank you! That’s good to know!! I appreciate your help!

LFingar Loc: Claverack, NY

The Canon mount adapter for EF lenses on the R and RP (same adapter) will give you the same or better performance then using the lens on a DSLR, such as your T2i. If anything, the lens works better. That is the general consensus of reviewers and my own experience in comparisons between my R and my 5DIV. Actually, I no longer have the 5DIV. I like the improved performance of the R so much that I sold the 5D just recently. I am now in the process of making a total switch to mirrorless. Your Tamron, and every other lens will communicate through the adapter with no problem.
Keep in mind that if you switch to an R you will be going from a crop sensor to a full frame. Your field of view with your lenses, as well as apparent magnification, will change. Your field of view will widen and the apparent magnification will decrease. If your Tamron gives you good results on the T2i then you should be more then happy with it on the R.
Personally, I would buy the RP instead of the R. You get nearly the same capabilities for less money. I would use the savings to get an EF 2xIII extender for the 70-200. I think you would find that to be a very good mid-range combo. Not to knock the Tamron, it's a fine lens, but I believe you would find that the 70-200, even with the extender, will have the edge in IQ.

Edit: I see that Chg Canon just mentioned some compatibility issues for certain lenses. I thought that had been rectified. Perhaps not. Definitely a good idea to check.

imagemeister Loc: mid east Florida

In the theoretical world, adapters ARE a cause for concern.

In the practical world, and from a reputable OEM manfacturer, the adapter should NOT be a cause for concern - but the potential does exist. I would not let it sway MY decision - unless PROVEN otherwise.
.

bleirer

How's the budget? I have the RP, very happy. The R tests with 1-2 stops better dynamic range and has more megapixels. but I don't know if that matters that much in the real world. New R coming https://www.canonrumors.co/rumors-canons-eos-rs-will-surpass-61mp-sony-a7r-iv-on-the-megapixel/

Blurryeyed Loc: NC Mountains.

I have the EOS R and do a lot of birding and I have to say that I have been very disappointed in this camera for that purpose. There are a lot of advantages in mirrorless cameras but the focus system of the R is lacking when it comes to wildlife and tracking, I sometimes have issues with simply focusing in low light using large aperture lenses, which is a shame because over the years I have gone to great effort to collect fast glass.

I know that we have some R owners in this thread that are thrilled with their cameras but I was warned by MTShooter when I got this camera that there were definite issues with the focusing system of this camera and he was right. I am very disappointed in its performance in that regard. It is not right to have to focus a Canon L lens manually because the R's focus system will not autofocus.

imagemeister Loc: mid east Florida

This is the same thing Tony Northrup is saying - BTW ....
.

rehess Loc: South Bend, Indiana, USA

Which camera are you comparing to??

Blurryeyed Loc: NC Mountains.

Well, I have had several Canon DSLR's the original EOS 6mp, the 50D, 60D, 7D, 7DII, and currently own 5DIV, 5DSR, and the EOS R, those would be the cameras that I have experience with.

Sark17 Loc: Atlanta, GA

Blurryeyed that’s a huge bummer!! I thought that was getting great reviews. Thanks for sharing your insight with it.

LFingar Loc: Claverack, NY

Have you done the firmware updates for the R? Particularly Ver 1.2.0? It addressed several auto-focus issues. As far as focusing in low light, I have used my EF 35mm f/1.4 L wide open in very low light with no focusing issues. If anything, the brightness of the viewfinder and the speed of focus were pleasant surprises. Haven't done much tracking with it yet, other then a few tests on some seagulls, but I had no more problem then with my 5DIV. I suspect that the issue there is more with the operator then the camera!
BTW, Ver 1.3.0 has been released. It only addresses compatibility with one particular lens.

imagemeister Loc: mid east Florida

Here is the link to the TN review regarding FOCUS .......https://www.youtube.com/watch?v=-oXHiORuRk0
.

Blurryeyed Loc: NC Mountains.

Thanks, I just took a look and my firmware is 1.1.0. I will give it a shot, if the camera would track as well as my MKIV does I would be much more pleased with the camera, had other focus issues also especially with my 85/1.2. Hopefully the firmware update will solve my issues, otherwise I like the camera, I am not thrilled with the functions being different than my MKIV but that issues lessons with use as you get used to the camera in fact I can see where with time I may like the functions more on the R, but I am not fully there yet.