enter image description hereFairly new to photography so forgive my foolishness before calling me out, I already know.

I bought a Olympus 50mm F1.8 lens thinking it was a manual focus but when I received it I realized I misread and actually bought an autofocus.

I currently have a Canon EOS Rebel T6 so the autofocus feature of course isn't working, but is there any possible way to buy an adapter that would allow for the autofocus feature to work or am I better off just reselling the lens to someone who could actually use it?

  • \$\begingroup\$ Actually now that I check its not an OM, its just an Olympus Lens AF 50mm 1:1,8. I guess it must have been listed improperly online since the listing said "Olympus OM AF 50mm f/1.8 Autofocus Camera Lens". But there is no manual focus ring on the lens \$\endgroup\$
    – andrew fay
    Oct 10, 2018 at 15:39
  • \$\begingroup\$ That indeed seems to be an OM lens (judging from amazon results of the exact same lens here). All I'm able to find is EF(-S) to OM with AF, but not the other way around. \$\endgroup\$
    – confetti
    Oct 10, 2018 at 16:04
  • \$\begingroup\$ Bummer, luckily it was only a $17 purchase so I could be way worse off. Thanks for all your help anyway :) \$\endgroup\$
    – andrew fay
    Oct 10, 2018 at 16:06
  • 7
    \$\begingroup\$ Andrew, don't waste money buying random lenses. Have a read through Can I use lens brand X on interchangeable lens camera brand Y? \$\endgroup\$
    – osullic
    Oct 10, 2018 at 16:23
  • 2
    \$\begingroup\$ Possible duplicate of Can I use lens brand X on interchangeable lens camera brand Y? \$\endgroup\$
    – flolilo
    Oct 10, 2018 at 19:51

2 Answers 2


The flange-focal distance only differs by a couple of mm between OM and EF mount, which means that the adapters are thin wafers of metal, with no space for adding electronics. It might be possible, but the extreme difficulty, combined with the fact that the auto-focus OMs weren't very popular compared to the manual models, means that there isn't much incentive for anyone to put the work into trying to produce such an adapter.


Currently, there isn't even a widely available commercial adapter to use OM AF/PF lenses manually. These rare lenses (which only fit two and a half mediocre-featured film camera models) have a mechanical aperture control but no aperture ring on the lens, and they are so obscure that no one yet marketed even a NEX bayonet adapter (which you can readily buy for lenses as obscure as Pentax 110 or 1960's Kodak bayonet) with the aperture slider you would need for OM AF.

These won't even fit on all OM adapters due to extra coupling elements.

Some of these can be manually focused by simply pulling and pushing on the front part, there will still be no aperture control (which would be nigh impossible to implement in a glassless adapter for EOS - there needs to be a motor in the adapter!) unless you are willing to hack the lens and unmount it to change aperture.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.