Toby

I have a Canon R7 that is relatively new. I since I could not buy the body only at the time I bought the entire body plus lens kit. I also bought the adapter ring so I could use my non-mirrorless lenses. When I got it I immediately tried all of my lenses on it, and it worked with all of them. I had some health problems during the summer and did not use it much. A week or so ago I decided to use it rather than my &DMII. Fortunately, I tried it out before I left home. When I tried it using my Tamron 18-400 on it the camera had trouble focusing. This never happened before, When I pointed the camera at something it would focus but when I pressed the button to shoot the picture it would refocus into a blur, every time. If I held the shutter release part way down it would continuously hunt for a focus. I didn't have much time, so I put the Tamron on to my 7DMII and it worked fine.
Earlier today I tested it with the Tamron and my Canon70-200 both worked fine. This evening (still daylight) I took these two lenses and the R7 to a shoot and I had almost the
same problem with the Tamron (this time it would not focus with the Tamron). It was better with the canon 70-200 but still not quite right.
I suppose I should send in both the camera and lens to the same place to be checked out but I had to send both during the peak fall sports season. But which place? Canon or Tamron. Both should be under warranty.
Before I do that I was wondering if any one here has had this problem? I was not using the eye tracking feature. Firmware is up to date at 1.3.1 Thanks to all of you in advance

CHG_CANON Loc: the Windy City

You're more likely to have made a setting that you've forgotten about in the camera. With new equipment, you can call Canon and ask for help. Don't say anything about the Tamron lens. Just discuss the 70-200 and the EOS R7 and adapter. You may need a camera reset. Or, something that isn't resolved by a reset. Not being there, it's hard to guess what / where the issue resides.

Architect1776 Loc: In my mind

I take it that there is no local place.
Canon will not be amenable to your dilemma with a non-Canon product.
Tamron would be the alternative.
Perhaps contact them first and see if they can help before sending them the lens and camera combination.
Canon has not been cooperative with sharing AF protocols with independents regarding the R cameras.
Perhaps others here can provide additional information, good luck.

mmills79 Loc: NJ

I only have one non Canon EF lens, a Tokina 11-16 wide angle and it focuses just fine.
It has been reported that in low light with some EF lenses, if you recompose slightly, when you use the shutter release button to also focus, sometimes the lens will hunt.

You can also try to switch to back button focus (remove the focus function from the shutter release) and perhaps you will be happier with that method to focus. With back button focus, you won't be asking the camera/lens to refocus when you hit the shutter button.

cmceagle

I've seen similar differences between my 7DMII and the R7, tack sharp with the 7DMII and hunting with the R7. I've come to believe it has a lot to do with how I set up the auto-focus points and what is the range to the subject. I seem to get a lot more hunting with spot or 1-point focus points and less with expanded area focus (this would be with the 100-500 mm at 500 mm). Seems with so few focus points there might not be enough contrast for the auto focus to work and the background wins out resulting with hunting (background sharp and subject blurry). For close subjects, sometimes it will not focus (say within 3 meters and at 500 mm). If I manually adjust the focus to get it in focus, then the auto-focus system will work even at these close in ranges. For me, it has all been learning with the electronic viewfinder/auto-focus system and lots of practice. Yes I have a higher percentage of in-focus with the 7DMII and the 100-400 MII than the R7 and the 100-500. But I'm staying with the R7 and continuing to practice and learn how to leverage the electronic viewfinder/auto-focus system. I spoke with someone else with an R5 and they reported the same focus issues.

abc1234 Loc: Elk Grove Village, Illinois

I had a similar problem which was simply that the autofocus switch was off on the lens. Solution: turn on the switch. Worked for me. Do not know if it will work for you but worth trying. Both the lens and the body must be set to autofocus.

I use Sigma lenses.

wcmoorejr Loc: Birmingham Alabama

I also have the same lens (except for the tamron, my tamron is the old 16-300 which does not work on the R7). The 70-200 works as well if not better on the R7 than it did on the 7DII. It would appear that you have a setting that is causing an issue rather than a bad camera. I would save your current settings to c1/2/3 and then reset the body back to factory. See if it works in factory settings. If it does then you can assume it was the combo of settings that you had that caused the issue. Start adding your settings back one at a time till it stops working (testing again after each setting is applied). It is not fast but it will identify the issue and it will also give you a lot of testing time with the new body which will give you a lot of knowledge with that settings do what things.

I shoot a lot of dance and dog sports (99% indoors under not ideal lighting conditions). I tend not to use eye focus but an expanded focus as I am trying to lock onto the center of the dog or dancer's body. Even with eye tracking off, the R7 will still try to identify the head in expanded focus mode.

John O.

I had the same problem the third time I used the Canon adapter and the Tamron 18-400mm lens. I turned the camera off, took off the Canon adapter from the camera and lens. I then put the Canon adapter on the Tamron 18-400mm lens, and put them on my R7. I then I turned on my R7. The R7 and Tamron lens started to communicate like they should. I have not had any problems with the Tamron lens since then. Have fun.

PHRubin Loc: Nashville TN USA

Many possibilities. Bad contact between lens/adapter/body. Auto/manual focus switch (on body or lens) in wrong position. Focus setting in body menu set wrong - to name a few.

Toby

First of all many thanks to everyone who offered some very good suggestions relative to my R7 focus problem when I use my Tamron 18-400 lens. Today I changed the AF to surround instead of spot and it seems to work OK. I think extended spot probably will also work but I didn't try it. The conditions were not exactly like they were the other day, but I think it is OK. If I have further problems, I will be back.
Once again thanks for all your help. This was much easier and less frustrating than trying to call the manufacturers.