Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
11-28-2010, 03:56 PM   #16
Inactive Account

Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
QuoteOriginally posted by stevebrot Quote
In general, you can't. The registration distance for M39 (LTM) is less than that for any SLR, so you give up infinity focus unless there is a correction lens built into the adapter (not good). The one exception is M39 (Zenit SLR). Those lenses have the same registration distance as M42 and Pentax-K.


My 37mm MIR (39mm mount) with the M42 adapter doesn't give me infinity focus.

11-28-2010, 05:36 PM   #17
Forum Member

Join Date: Feb 2007
Location: Los Angeles
Posts: 77
Here's my shiny friend... I haven't actually mounted it on a digital camera yet.

11-28-2010, 05:38 PM   #18
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,212
Some of the Meyer wide angle and "normal" lenses are not only cool looking but decent performers as well, especially the Meyer 29/2.8. I have a "Zebra" Helios 58/2 sitting on my Contax D. I think I paid $15 for it.
11-30-2010, 04:58 AM   #19
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
Many Exakta-mount German lenses are bright shiny metal, and cheap, like the fat Meyer Primagon 35/4.5 in front of me right now. Here is how to adapt such a lens for a Pentax mount:

* Obtain a cheap Bower-type M42-PK adapter, a cheaper M39-M42 adapter ring, some Gorilla Glue, and a sheet of 300-grit sandpaper.
* Set the sandpaper on a very flat hard surface.
* Grind away the lens-side (wider) flange of the M42-PK adapter to remove ~0.8mm, leaving just a a razor-thin flange.
* Use VERY LITTLE Gorilla Glue to secure the M39-M42 adapter ring around the Exakta bayonet. [NOTE: Gorilla Glue expands by 4x-6x times. It can get ugly.] You may need to remove a stop screw from the lens base. Don't lose it, in case you ever want to dissolve the glue and return the lens to its Exakta state.
* After the glue dries, screw the M42-PK adapter onto the lens. Voila! You now have infinity focus.

Another bright shiny cheap metal lens: the tiny Enna Tele-Sandmar 100/4.5 for Argus C3 rf's, often obtainable for US$10-20. I am awaiting delivery of a 42-43mm stepup ring (US$4), which I am told allows the Sandmar to have infinity focus on a Pentax camera when glued correctly. Or, drill a hole in a Pentax body cap, and use Gorilla Glue to hold the lens in place in the body cap. Ah, with that lens, you'll love the old-timey look, eh?


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

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
People Shiny Warped Post Your Photos! 4 06-07-2010 09:09 PM
Chrome Glorious Chrome UltraWide Post Your Photos! 9 08-23-2009 05:43 AM
Cheap manual lens on cheap extension tube with cheap flash! Also cats. pasipasi Post Your Photos! 12 08-28-2008 04:43 PM
cheap lenses vs expensive lenses WMBP Pentax DSLR Discussion 21 12-19-2006 11:08 AM

All times are GMT -7. The time now is 09:02 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]