Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-25-2017, 02:34 AM   #1
New Member




Join Date: Jul 2017
Posts: 11
3rd party lenses

I have a K50. These are probably very na´ve questions for long term Pentax users but here we go anyway.


Is it possible to use Nikon, Canon, Adaptall mount lenses on the pentax k ?


If so, are functions like auto focus still useable?

08-25-2017, 03:10 AM   #2
Site Supporter
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: North Syracuse, NY
Photos: Gallery
Posts: 14,747
Adaptall is a manual focus mount, it will work with a K-mount adapter.

There are no auto focus adapters for Nikon or Canon mounts. Manual focus adapters for Nikon F-mount are basically a short tele-converter. Leitax makes a mount replacement that can convert some manual focus F mount lenses to K mount. The old Canon FD mount can be adapted with a similar short tele-converter. There are no Canon EOS adapters for K-mount.
08-29-2017, 07:57 AM   #3
Junior Member




Join Date: Mar 2010
Location: Essex
Photos: Gallery
Posts: 41
QuoteOriginally posted by boriscleto Quote
Adaptall is a manual focus mount, it will work with a K-mount adapter.

There are no auto focus adapters for Nikon or Canon mounts. Manual focus adapters for Nikon F-mount are basically a short tele-converter. Leitax makes a mount replacement that can convert some manual focus F mount lenses to K mount. The old Canon FD mount can be adapted with a similar short tele-converter. There are no Canon EOS adapters for K-mount.


Nikon lenses have a slightly longer rear focal distance than PK mount. I've heard it is possible to get them to (miss)mount on a PK mount by turning them part way round. With the registration being slightly shorter than they are designed for the lens will then focus beyond infinity, loosing some of the close focus capability of the lens... Of course AF & electronic aperture will not be available with this.
I've not tried, but if miss mounting works the Nikon lenses could be used with a Pentax 1.7x AF teleconverter to give limited AF


There are two types of Adaptall2 K mounts, the PK version & the PKA version. Both work but the PKA is better giving camera control of aperture.
M42, T2, C/Y & medium format lenses can also be adapted readily to Pentax bodies in fully manual mode.
It is possible to jury rig adapters for many other lenses if infinity focus & auto features are not required.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
3rd party, k-30, k-50, lenses, pentax, pentax k30, pentax k50
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Best Lenses your opinion wanted 3rd party lenses 'non pentax' Krusty Surfer Pentax SLR Lens Discussion 58 02-20-2015 05:25 PM
Why do 3rd party lenses vary so much in price between different mounts? Outis Pentax SLR Lens Discussion 8 12-01-2014 07:00 PM
If allowing 3rd party lenses in Pentax Lens Tournament ... starjedi Pentax SLR Lens Discussion 28 11-04-2014 06:22 AM
3rd Party Lenses with "A" setting BrentPDX Pentax SLR Lens Discussion 7 01-06-2011 05:36 AM
3rd party lenses - where to post? Nass Site Suggestions and Help 6 09-03-2009 10:59 AM



All times are GMT -7. The time now is 01:40 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top