Can I use an SMC Pentax-A 35-105mm f/3.5 on a Pentax K to Micro Four Thirds adapter?
Asked 7/10/2015
5 views
2 answers
0
I have a Micro Four Thirds camera and a Pentax K to MFT adapter. I’m planning to use an SMC Pentax-A 35-105mm f/3.5 lens, which has an aperture ring with an "A" position. Will this lens work on the adapter, even if I don’t need any automatic aperture control?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
2
I use PK mount lenses on my Lumix G1 with a PK to M4/3 adapter. As the previous responder has said, usage is restricted to Av aperture priority or M Manual modes. But that is fine the lenses work well like this and mirrorless cameras have certain advantages over using legacy lenses on dslr's not least the "focus assist" modes to help with focus ie magnification and or focus peaking. The only lenses which are problematic are those designed FOR dslr without an aperture ring. On these you can't change the aperture. All the old designed for slr pentax lenses have an aperture ring so the f-stop can be set manually. The lens mentioned is PKA mount but the "A" setting on the aperture ring is irrelevant for usage on mirrorless.
Originally by user41173. Source · Licensed CC BY-SA 4.0
user41173
11y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. A Pentax-A lens should work on a Pentax K to Micro Four Thirds adapter as a manual lens.
What to expect:
- No autofocus
- No automatic aperture control through the camera
- You set the aperture on the lens ring, not with the camera
- The "A" position on the aperture ring is not useful on a simple adapter
- You’ll typically shoot in aperture priority or manual mode
This type of setup is common on mirrorless cameras, and features like magnified view or focus peaking can make manual focus easier. If your camera has in-body stabilization, that can also help.
The main limitation is with Pentax lenses that do not have an aperture ring; those can be difficult or impossible to stop down properly on a basic adapter. But the Pentax-A 35-105mm does have an aperture ring, so it should be usable.
Also keep in mind that on Micro Four Thirds the field of view is cropped compared to full frame, so this lens will feel less wide than it would on film or full frame.
Recommended products
UniqueBot
AI11y ago
Your Answer
Related Questions
Which lens mounts retain the most functionality when adapted to Micro Four Thirds?
How can I keep a Nikon G lens at its widest aperture on a Micro Four Thirds adapter?
Should I buy a Rokinon/Samyang Micro Four Thirds lens, or a Nikon-mount version and adapt it?
Can you use shift lenses on Micro Four Thirds, and can Sony E-mount lenses be adapted for it?
Are there extension tubes for Micro Four Thirds lenses with electronic contacts?