edmidlifecrisis wrote in post #18981941
I posted this in the R tech thread here but got no responses. In the Facebook EOS R group two people responded that they were having the same issues, one with long primes and one with a zoom combo see below.
With my 3002.8 prime and 2x TC both the newest versions. If the lens focus point is say resting at or near infinity and I pick the camera and lens up to focus on something closer, the AF doesn't move. I have to manually move it to the closer range for it to lock on. The opposite happens too. It the lens is sitting focused close and I place something in the viewfinder far away, nothing happens until I give the focus a "running start". It is like there is not enough juice to run the whole focus range in the camera on this combo. This of course makes my standard 300 f2.8 with 2.0 TC@ that I use so successfully on my 5DIV and 7DII useless on the R for wildlife. So far I have not had this issue on the 100-400 ii with the R. Someone on Facebook said he has this issue with the 100-400 and the 1.4 TC. I also use that combo but have not tried it on the R yet with the TC. Maybe I will today. EDIT: Same thing happens with the 100-400 and 1.4TC. A little better but still basically the same issue- not enough juice to go from infinity to up close.
I am wondering if this is an intrinsic limitation or a setting that needs to be changed. I can't figure it out. But it is not making me happy.
Ed
I assume a setting. Have you tried moving the sliders? I found using auto point switching set to the fastest, your accel slider set to plus 1 and your locked on (never on the locked lowest setting) but I do use the others, this has worked best for me. Also using the lens limiter switch helps a lot so you do not travel the entire focal plane if you do not need too. I also have everything I do not use/need shutoff/disabled. I also found the focus square set to small works better. Mine works with the 400 f2.8 Mk III, 200-400mm, 400mm DO II, 70-200mm without focus issues. I have the grip too, makes no difference with the grip or without. Not sure if it matters but I use back button focus too. Amy does not use back button focus, so that will be a good test. I will try tomorrow with her setup and see if there are issues. Sorry for the troubles with yours.