Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-25-2009, 08:42 PM   #1
Site Supporter
Site Supporter
gsrokmix's Avatar

Join Date: Oct 2009
Location: CT
Photos: Albums
Posts: 400
K mount to M42 adapter?

This may be a silly question but does anyone make an adapter to put a K mount lens on a screw mount Pentax? Everyone seems to wanna put old lenses on newer cameras, but how about the opposite?

Thanks!

George

11-25-2009, 09:58 PM   #2
Site Supporter
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,698
Adapting in this direction is not possible. The M42 mount is smaller in diameter and both mounts share the same registration distance.

Sorry.

Steve
11-26-2009, 02:33 AM   #3
Site Supporter
Site Supporter
Steve Beswick's Avatar

Join Date: Apr 2009
Location: Ontario, California
Photos: Gallery
Posts: 1,584
While I agree with what stevebrot said, you could convert some k-mount lenses to m42, but it would be a hack & a one way trip.
11-26-2009, 09:30 AM   #4
Veteran Member




Join Date: Mar 2009
Location: Chicago suburbs
Photos: Albums
Posts: 848
It would be kinda easy to hack an old K-mount teleconverter by changing the camera end to a screw mount. Or take the glass elements out of the converter when you hack it, and use it for close-up shots. It would be manual aperture, tho.
GP

11-26-2009, 09:39 AM   #5
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,213
QuoteOriginally posted by Steve Beswick Quote
While I agree with what stevebrot said, you could convert some k-mount lenses to m42, but it would be a hack & a one way trip.
The other option may be to replace the mount on a Spotmatic SP II to K-mount. However, why not just get a KM and be done with it.
11-26-2009, 07:11 PM   #6
Site Supporter
Site Supporter
gsrokmix's Avatar

Join Date: Oct 2009
Location: CT
Photos: Albums
Posts: 400
Original Poster
Thanks for the replies. I was asking because I wanted to use a K mount lens on my K20 w/ my M42 extension tubes. The ones I have are original Pentax. I have searched the forum & couldn't find out if there were a decent set of K mount tubes. All of the cheap ones I see on ebay haven't gotten good reviews (that I've seen)!

Thanks,

George
11-26-2009, 07:14 PM   #7
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,213
QuoteOriginally posted by gsrokmix Quote
Thanks for the replies. I was asking because I wanted to use a K mount lens on my K20 w/ my M42 extension tubes. The ones I have are original Pentax. I have searched the forum & couldn't find out if there were a decent set of K mount tubes. All of the cheap ones I see on ebay haven't gotten good reviews (that I've seen)!

Thanks,

George
The Pentax manual or automatic k-mount extension tubes will work as good in the case of the manual, or better in case of the automatic ones than the m42 tubes. There is also a set of Vivitar that have the linkages like the auto Pentax ones. No one makes any with the A contacts or AF except Kenko and those are out of production and hard to find use.
11-26-2009, 10:09 PM   #8
Veteran Member




Join Date: Mar 2009
Location: Chicago suburbs
Photos: Albums
Posts: 848
Get a 2x teleconverter with the "A" contacts ( try ebay ) and remove the glass elements - You will then have a ~25mm extension tube that will work on your DSLR with auto exposure.
GP

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

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
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: *New* Pentax Mount Adapter-K M42 to K-Mount X Man Sold Items 4 12-31-2008 04:10 PM
For Sale - Sold: SMC Takumar 35/3.5 M42 mount with M42 to PK adapter cousinsane Sold Items 9 10-19-2008 04:10 PM
M42 to K mount adapter TakeshiKovacs Pentax Film SLR Discussion 9 07-09-2008 04:28 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 06:19 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