Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-30-2010, 11:49 AM   #1
Inactive Account




Join Date: Nov 2009
Location: saskatoon
Posts: 16
AF with leitz 400mm 6.8

Here's one for anyone who might like to stab at this thought. Can an SMC F 1.7x AF adapter work on an adapted leica 400 telyt 6.8 for use with a K20d > and for nothing else used as a fine focus aid and would the focus confirmation function with it? If so or even if it's worth a try any ideas on where one could be purchased? Or is the Earth truly flat and we have just been lied to.

John

04-30-2010, 11:58 AM   #2
Pentaxian




Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,194
"leica 400 telyt 6.8"

Is "6.8" the max aperture? If it is, 1.7X will effectively make it F/11. At this aperture, there is no autofocus, nor focus aid.

F/4 is the slowest aperture I'm able to use the 1.7X AFA with and still have autofocus.
04-30-2010, 01:14 PM   #3
Inactive Account




Join Date: Nov 2009
Location: saskatoon
Posts: 16
Original Poster
auto focus and 400 telyt

Well, shoot, it was a shot. I think my vision and balance issues has done in the use of this lens for me. I may have to get a 300 f4 AF. Can the AF adapter still be purchased? I have a friend that has an M 300 he rarely uses.

John
04-30-2010, 02:51 PM   #4
Pentaxian




Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,194
QuoteOriginally posted by John Wiggs Quote
Can the AF adapter still be purchased? I have a friend that has an M 300 he rarely uses.
A few weeks ago, I saw somewhere (FeaBay?) a guy with ten new Pentax 1.7X AFA copies. The price, IIRC, was about US $350 shipped from Japan.

I once used the AFA with a Super Takumar 300mm F/4 and an SMC-A* 300mm F/4 - worked great. I'm now using it with a DA* 60-250. Here are a few test photos (JPEG directly from K10D, no post-processing):

DA* 60-250 at 250mm and F/4

DA* 60-250 at 250mm and F/5.6

DA* 60-250 at 250mm and F/4 + 1.7X AFA

DA* 60-250 at 250mm and F/5.6 + 1.7X AFA

05-07-2010, 02:48 AM   #5
Veteran Member
Piotr's Avatar

Join Date: Jan 2007
Location: Warsaw
Photos: Gallery
Posts: 337
QuoteOriginally posted by John Wiggs Quote
Here's one for anyone who might like to stab at this thought. Can an SMC F 1.7x AF adapter work on an adapted leica 400 telyt 6.8 for use with a K20d > and for nothing else used as a fine focus aid and would the focus confirmation function with it? If so or even if it's worth a try any ideas on where one could be purchased? Or is the Earth truly flat and we have just been lied to.

John
I have Leitz 560mm/6.8. I never tried to use it with AF 1.7 but for sure Af won't work.


Leitz 560mm is better than Pentax K500/4.5.

Leitz 560mm f/6.8 Telyt-R Photo Gallery by Piotr Sobolewski at pbase.com
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!
af, camera, dslr, focus, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leitz 60mm f/2.8 Macro-Elmarit-R Piotr Pentax SLR Lens Discussion 18 10-17-2010 10:10 PM
Ernst Leitz Wetzlar Microscope GT Baseball General Talk 0 12-17-2009 07:25 AM
Leitz Elmarit-R 1:2.8/180 and Pentax K20D Piotr Pentax SLR Lens Discussion 8 02-18-2009 07:09 AM
Leitz, Kamera, Action! ftpaddict Post Your Photos! 10 05-20-2008 10:29 AM
Leitz Pradovit Projector???? Jimfear Photographic Technique 4 08-21-2007 02:11 PM



All times are GMT -7. The time now is 07:01 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