Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-06-2010, 09:22 PM   #1
New Member
neverbnnba's Avatar

Join Date: May 2010
Location: Lexington, Kentucky
Photos: Albums
Posts: 24
Is this a Pentax mount....I HOPE.

i picked up a super cheap old lens on for $6 and I hope it's a pentax screw mount. If not I'll just use it on a 4/3rds body or something. - #6405718 - Promaster Spectrum 7 1:4~5.6 70-210mm Camera Lens - 7/6/2010 10:06:18 AM

07-06-2010, 09:35 PM   #2
Veteran Member
KxBlaze's Avatar

Join Date: Feb 2010
Location: California
Photos: Gallery
Posts: 1,594
Looks like a M42 to me.
07-07-2010, 04:45 AM   #3
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
It looks like an M42 mount, so you will need to get an M42 to K mount adaptor

Also, it looks like an auto only lens, so you may need to force the aperture to stop down, by modifying the pin actuator.

I generally do this by taking the mount off the lens, and placing a spacer between the base of the mount and the lever the little pin pushes on, The perfect spacer is about 1/8 inch of refil tubing from a ball point pen.

there are threads on this mod, and it is removable if you want to resell the lens at some time.

Others have indicated that for $20 you can get an M42 mount that has a flange to activate this pin in the UK
07-08-2010, 11:33 AM   #4
New Member
neverbnnba's Avatar

Join Date: May 2010
Location: Lexington, Kentucky
Photos: Albums
Posts: 24
Original Poster
wow lowell thanks man! That's a mod I have to try!


  • 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!
k-mount, lens, pentax, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
adapters for non-K-mount lenses to Pentax K-mount DSLRs: new dimensions for LBA Douglas_of_Sweden Pentax Camera and Field Accessories 152 07-29-2017 05:47 AM
Ricehigh: No More Hope With Pentax Asahiflex General Talk 143 07-11-2009 12:14 PM
Hope this wasn't a Pentax user... budkid General Talk 9 02-28-2009 01:38 AM
For Sale - Sold: Genuine Pentax Mount Adapter K (M42 to K-mount) zx-m Sold Items 6 01-30-2009 01:22 AM
For Sale - Sold: FA: Original PENTAX Screw Mount to K Mount Adapter M42 HogRider Sold Items 0 10-21-2007 02:12 PM

All times are GMT -7. The time now is 09:51 PM. | 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]