Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
10-10-2016, 04:07 AM   #1
New Member

Join Date: Sep 2016
Posts: 16
Pentax K Lenses on 67 Mount

Hi folks,
i'm not sure either if it's the right section and a question with sense, i was looking for an adapter to use pentax K lenses on 67 mount, i know that using a lens made for a smaller sensor can bring some issues (corner softness and aberrations, sharpness etc) i would like to know if is there anything available

thanks in advance

10-10-2016, 04:29 AM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 47,402
I don't think there is. The 6x7 format is more than twice FF size, so K-mount lenses wouldn't make much sense.

Adam Webmaster (Site Usage Guide | Site Help | My Photography) server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

10-10-2016, 05:09 AM   #3

Join Date: Jul 2009
Location: Tromsų, Norway
Photos: Albums
Posts: 1,028
I think you have to get that adapter specially made for you. Be aware that the focal flange distance is very different so you wouldn't be able to focus to infinity. Probably only in the macro range. When focusing that close the image circle will probably be significantly larger then normal, but not necessarily as big as 67. Vignetting would probably be very significant.

To sum it up, I think its a bad idea unless the purpose only are proof of concept.
10-10-2016, 09:19 AM   #4
Site Supporter
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 5,838
The only way you can use a 35mm format lens on a 6x7 camera is reversed. Pentax made a 6x7 mount adapter with a 49mm filter thread just for that purpose.

I have used my SuperTakumar 28/3.5 reversed on a 6x7 body for Macro work and it worked very well with around 5x magnification achieved. (With the 6x7 helicoid.extension tube)



  • 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!
645d, 645z, camera, lenses, medium format, pentax, pentax k lenses
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K Mount lenses on Fuji x Mount? Uncle Pete Non-Pentax Cameras: Canon, Nikon, etc. 5 09-12-2016 08:49 AM
Adapted Lenses on the Pentax K mount anu l Pentax SLR Lens Discussion 13 01-06-2016 11:08 AM
Leica lenses on a Pentax K mount camera? kshapero Pentax SLR Lens Discussion 4 07-16-2014 03:05 PM
67 lenses and K-mount b0bg Pentax SLR Lens Discussion 2 01-18-2010 10:20 PM
pentax 67 lens on k mount? roentarre Pentax SLR Lens Discussion 11 12-07-2006 03:00 PM

All times are GMT -7. The time now is 12:56 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]