Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-21-2012, 08:47 AM   #1
New Member




Join Date: Jan 2011
Location: Sheffield
Photos: Gallery
Posts: 9
teleconverters with old glass on 645 D

Am currently looking at the 67 300 mm ED lens on a 645 D.

I realise I need to use the 67 to 645 adaptor but can I use 67 or 645 teleconverters on the 645 D?

Also, I trust with any old 645 lens the 645 converters work OK on the 645 D?

11-21-2012, 10:42 AM   #2
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 868
The 300 EDIF was one of the last lenses made for the 67, so it is really not that old. I use mine with a 1.4X Pentax 67 converter (gray) on a Leica SLR with adapter. It works fine and imagine it would do well on your 645D. You will probably have to use the lens in MANUAL mode so your body can accurately meter.
11-21-2012, 11:01 AM   #3
Site Supporter




Join Date: Feb 2008
Photos: Gallery | Albums
Posts: 413
The 645 converters work with any old 645 lens; not sure about the new DFA lenses with no aperture ring. You can use the 67 lens with a 645 or 67 converter, it simply is a matter of where you put the 645/67 adapter - on the lens or the converter. One advantage of the 67 lens with a 67 converter is that combo transmits the aperture information to the body so you do not need to use it in manual mode.
11-21-2012, 11:29 AM   #4
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 868
It is my understanding that the 67 to 645 adapter will not transmit correct metering info to the camera and so that is why I said that using the lens in manual mode was necessary.

11-21-2012, 03:44 PM   #5
Site Supporter




Join Date: Feb 2008
Photos: Gallery | Albums
Posts: 413
I have the 67 2x and 1.4x along with the 67 300mm ED; I have used them on a 645D, 645N and 645. In all cases the aperture information is transmitted to the body by a small arm that moves with the aperture ring.
11-21-2012, 03:46 PM   #6
New Member




Join Date: Jan 2011
Location: Sheffield
Photos: Gallery
Posts: 9
Original Poster
Thanks one and all for your valued experience and advice. Welcome any more tips on what combinations work best before I make an investment in Tcs.
11-21-2012, 09:09 PM   #7
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 868
Thomas, the tests of the 67 to 645 adapter show that the diaphragm info is not correctly conveyed to the camera (in wide open mode), indicating that the lens cannot be wide open metered. It sounds like the diaphragm will stop down to the prescribed stop when firing however. Are they right? Pentax 67 Lens to Pentax 645 Body Adapter Reviews - Pentax 67 Teleconverters and Adapters - Pentax Lens Reviews & Lens Database
11-22-2012, 07:57 AM   #8
Site Supporter




Join Date: Feb 2008
Photos: Gallery | Albums
Posts: 413
QuoteOriginally posted by desertscape Quote
Thomas, the tests of the 67 to 645 adapter show that the diaphragm info is not correctly conveyed to the camera (in wide open mode), indicating that the lens cannot be wide open metered. It sounds like the diaphragm will stop down to the prescribed stop when firing however. Are they right? Pentax 67 Lens to Pentax 645 Body Adapter Reviews - Pentax 67 Teleconverters and Adapters - Pentax Lens Reviews & Lens Database
No they are incorrect. I have used a number of my 67 lenses on the 645D all with open metering. There are two arms on the adapter. One activates the diaphragm during exposure, the other is coupled to the aperture ring and transmits the f stop to the body just as a 645 lens does when not used in A mode.

02-13-2013, 12:31 AM   #9
Site Supporter




Join Date: Nov 2011
Location: pontiac mi.
Posts: 339
QuoteOriginally posted by parks Quote
Thanks one and all for your valued experience and advice. Welcome any more tips on what combinations work best before I make an investment in Tcs.
i have the 300mm 67 and 67 to 645 adapter.i have used it with 2 2x converters stacked together.manual focus , no exposure problems.
03-10-2013, 08:14 AM   #10
Site Supporter




Join Date: Nov 2011
Location: pontiac mi.
Posts: 339
QuoteOriginally posted by parks Quote
Thanks one and all for your valued experience and advice. Welcome any more tips on what combinations work best before I make an investment in Tcs.
i hook the 645 converter to the 645d, i hook the 67 to 645 adapter to the 67 lens, then i hook the 67 lens/dapter combo to the converter and i'm good tto go. i can also stack 2 converters together. if you don't use a lens support, you are asking for trouble.
03-11-2013, 12:02 AM   #11
672
Site Supporter




Join Date: Dec 2010
Location: santa monica
Photos: Gallery
Posts: 412
I have found that all the 645 and 67 lens and converter combinations work well and look good , but sometimes if my setup is, camera > 645 1.4tc > lens adapter >67 lens , the metadata for stop will be very random. Some lenses it reads it an f8 no matter what, and others it reads as f32 or f64. The point is its always wrong info. I am proccessing in ACR.
03-17-2013, 10:23 PM   #12
Site Supporter




Join Date: Nov 2011
Location: pontiac mi.
Posts: 339
QuoteOriginally posted by desertscape Quote
It is my understanding that the 67 to 645 adapter will not transmit correct metering info to the camera and so that is why I said that using the lens in manual mode was necessary.
manual focus, auto or manul mode.
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!
camera, lens, medium format, teleconverters
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Correct Sequence of Teleconverters (Metering With Teleconverters) MMurphy37 Troubleshooting and Beginner Help 19 09-18-2012 05:20 PM
Misc A Few Beach Birds Shot With Some Old Glass joe.penn Post Your Photos! 8 02-27-2012 04:51 PM
K-x with old glass? Glenn M Pentax DSLR Discussion 2 01-18-2011 02:03 PM
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
Old Glass on K7? XeroX Pentax SLR Lens Discussion 19 08-07-2010 08:00 AM



All times are GMT -7. The time now is 03:02 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