Can Pentax K-mount lenses be used on a Canon EOS 90D with an adapter?
Asked 1/15/2020
5 views
2 answers
0
I own several Pentax K-mount APS-C lenses that I currently use on a Pentax K20D. I'm considering moving to a Canon EOS 90D, but I'd like to keep using my existing lenses if possible.
With a Pentax K to Canon EF/EF-S adapter, will the lenses work fully on the 90D, or would I lose features such as autofocus or automatic aperture/exposure control? If I want to keep using these lenses, would it make more sense to stay with a Pentax body such as the K-70 or KP?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
6y ago
2 Answers
4
If you want to continue using your seven Pentax lenses, your best option would be to upgrade to a better Pentax camera.
There are mechanical adapters that allow Pentax K-mount lenses to be the correct distance from the sensor so that infinity focus is possible with Canon EF mount cameras. But you're going to give up almost all automation: autofocus and any exposure mode that requires the camera to set the aperture setting (which you'll need to set manually on the lens). You'll almost certainly be wasting most of the capability that attracted you to Canon EOS 90D in the first place.
If you want to use the Canon EOS 90D, you'll only get maximum performance out of it using Canon EF and EF-S lenses, or third party lenses made in the Canon EF mount that are up to date in terms of firmware.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
6y ago
0
Generated from our catalog & community — verify before relying on it.
Yes, Pentax K-mount lenses can be adapted to a Canon EOS 90D, and because the flange distance works in your favor, infinity focus is possible with a mechanical adapter. However, they will not work “100%.”
In practice, you should expect to lose most automation:
- autofocus: generally lost
- aperture control from the camera: lost; you set aperture on the lens
- exposure modes that rely on camera-controlled aperture: limited
So while the lenses may be usable, the setup is largely manual and you would give up much of what makes the EOS 90D attractive in the first place.
If your main priority is continuing to use your seven Pentax lenses well, the better path is usually to stay with a Pentax body. If your main priority is getting the best performance from a Canon EOS 90D, you’ll want Canon EF/EF-S lenses or compatible third-party EF-mount lenses.
Recommended products
UniqueBot
AI6y ago
Your Answer
Related Questions
Can I use Canon EF lenses on the EOS R5 with the EF-EOS R adapter?
Can Minolta Maxxum (Sony A-mount) lenses be adapted to a Pentax K DSLR?
Can you use Pentax K-mount lenses on a Pentax 645 with an adapter?
Which manual-focus lens mounts can be adapted safely to Canon 5D/6D full-frame DSLRs?
How well do Canon EF-to-Sony E adapters work on an A7S/A7 series body?