DPReview.com is closing April 10th - Find out more

EF-M Adpter: Focus problems

Started Feb 14, 2021 | Questions thread
istscott
istscott Regular Member • Posts: 467
Re: EF-M Adpter: Focus problems

R2D2 wrote:

Robert Seetzen wrote:

istscott wrote:

I don't have any answers, but I did buy a new Canon 85mm f/1.8 stm that had inconsistent focus accuracy with the official adapter. Though the 50mm f/1.8 stm I have works well.

Oh, that doesn't sound good. Up until now I was hoping that these problems would be limited to lenses from other manufacturers - simply because Sigma, Tamron, etc. do not have access to the full communication protocols between the camera and lens.

Perhaps you have the opportunity to try out your 85mm on an SLR? Because if there weren't any focus problems there, it would definitely be due to problems with the adapter.

Do you use the lenses on an M-Series or with R camera?

I’d avoid conflating issues here. You’ll muddy the waters and then never find your way out.

For now stick to determining why your Tamron lenses are misbehaving. Have they offered any solutions yet?

The Canon EF 85mm f/1.8 USM (there is no EF 85mm STM) can be a little squirrely on any body. Mine needed tons of AFMA on my DSLRs, and it is under-performing on my mirrorless cameras. I’m ditching it in favor of the 85mm f/1.4L soonest I can.

I’d reiterate that I don’t think your issue lies with the adapter (and the body is proven). Take it from there...

Best of luck!

R2

Oops, yeah, usm...

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow