Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-01-2011, 04:37 AM   #1
Forum Member
angus's Avatar

Join Date: Nov 2007
Location: Germany
Photos: Gallery
Posts: 98
How to get AF-adapter to work with 645 adapter

Hi folks,

I recently acquired a really nice 645 400/5.6 EDIF lens for relatively little money, bought an adapter and was wondering, why I can't get the AF-1.7x adapter to function, i.e. focus with this set-up. Any ideas?

(I'm using a K-5)

Thx

Angus

04-01-2011, 04:40 AM   #2
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,485
The best way to use the AF adapter is to get your Lens close to proper focus. Then hit the shutter (or AF) button and the adapter should snap right into focus.

04-01-2011, 04:43 AM   #3
Forum Member
angus's Avatar

Join Date: Nov 2007
Location: Germany
Photos: Gallery
Posts: 98
Original Poster
Jeff, I know this from using it with my 300/2.8 A*, but here it won't start focussing at all. Possibly because there is no automatic setting? But it does work with my Sigma Mirror lens, which also just has an open aperture... ??
04-01-2011, 05:26 AM   #4
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,485
I'm afraid I don't have any more solid advice then. As a Guess, It Sounds as if the adapter may not know a lens is there. If I understand the 645 to K adapters correctly, they are just a barrel. Maybe it isn't making proper contact to the AF adapter. Similar to how we have to short the pins for some functions when using an M42 lens.



04-01-2011, 05:46 AM   #5
Forum Member
angus's Avatar

Join Date: Nov 2007
Location: Germany
Photos: Gallery
Posts: 98
Original Poster
This could well be the case - which pins would I shorten and how? Could somebody enlighten me or show me the way to a thread dealing with this? Thanks. It's a great lens to use by the way, comparably light and super sharp.

Angus
04-01-2011, 05:53 AM   #6
Forum Member
angus's Avatar

Join Date: Nov 2007
Location: Germany
Photos: Gallery
Posts: 98
Original Poster
Searched for myself and found the bit about shortening - thx for giving me the idea, Jeff, will try for that!
Angus
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, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Contax 645 lens adapter for Pentax 645/645D? MikeSeb Pentax Medium Format 2 01-18-2011 07:47 AM
K5/K7 with K-Adapter/645 and PENTAX-D FA 645 55mm F2.8 = WEATHERPROOF??? Wololo Pentax News and Rumors 9 09-08-2010 05:14 AM
Will the 67 to 645 adapter make a comeback? mikebob Pentax Medium Format 27 06-27-2010 08:59 AM
645 Adapter K and aperture drougge Pentax Camera and Field Accessories 2 04-22-2010 02:51 AM
645 adapter puzzle pdstromberg Pentax SLR Lens Discussion 15 04-22-2009 12:28 PM



All times are GMT -7. The time now is 11:29 AM. | 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