Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-28-2012, 01:09 PM - 1 Like   #1
Site Supporter




Join Date: Jun 2011
Location: Texas
Photos: Gallery
Posts: 1,116
Asahiflex Lenses on K-mount

For those who have Asahiflex lenses, using them on K-mount cameras has been difficult. The Asahiflex used an M37 thread mount, smaller than either the Leica M39 or Pentax M42 threaded mounts. Asahi did make an adapter to M42, but they are very scarce now.
A seller on eBay has made some M37 to M42 adapters that seem to work well:
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
Mine came today, and as you can see, it works nicely mounting on the K-5:

Name:  Aflex lens on K-5.jpg
Views: 1974
Size:  256.1 KB
This adapter goes to M42 thread, so then use an M42 to K-mount adapter as well:
Name:  M37-K adapters.jpg
Views: 1038
Size:  255.8 KB
One negative is that the threads are not indexed relative to each other. That means the lens may mount in any orientation, so the focus and fstop index marks will not be on top when mounted.

01-28-2012, 03:49 PM   #2
Forum Member




Join Date: Apr 2010
Location: Santa Barbara
Photos: Albums
Posts: 60
M37-m42

QuoteQuote:
One negative is that the threads are not indexed relative to each other. That means the lens may mount in any orientation, so the focus and fstop index marks will not be on top when mounted.
Appears, it depends on luck. Tak 135mm f3.5 (all silver M37) is spot on, on the top. It doesn't matter much anyway, since the focusing throw is over 360 on that lens (6ft - ~). But the price for this adapter is very nice and more importantly, the lens keeps INFINITY focus!
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!
adapter, asahiflex, ebay, k-mount, lenses, m37, m42, pentax help, thread
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 151 11-01-2014 09:26 AM
For Sale - Sold: 4 K mount lenses and 1 M42 screw mount lens (US/CAN) alanjoke Sold Items 8 07-20-2011 06:05 AM
Who repairs Asahiflex cameras and Tak preset lenses? SteveM Pentax Film SLR Discussion 3 04-19-2011 09:25 PM
About the asahiflex summonbaka Pentax Film SLR Discussion 4 05-11-2010 10:54 AM
K-x lens mount with old k-mount lenses sipper Troubleshooting and Beginner Help 9 03-18-2010 05:45 PM



All times are GMT -7. The time now is 10:26 PM. | See also: NikonForums.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