Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-04-2015, 08:22 AM   #1
Forum Member

Join Date: Feb 2013
Location: Schwarzwald
Photos: Albums
Posts: 73
Using outer bay tubes

I luckily got a set of these super rare outer bay tubes for my Pentax 67 system. I looked for them, because itīs much easier to put the 67II with AE-Finder on the Pentax autobellows than without (it works as opposed to the 67II manual, but it takes to disconnect the AE-Finder before attaching the Autobellows). Now I wonder how to use the outer bay tubes. One part can be turned quiet many times. How do you use them?

04-04-2015, 08:52 AM   #2
Site Supporter
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 6,776
Here is the link to the Pentax manual, the outer tubes are at the end:


I’m not sure how you want to use them on the Autobellows, but these outer extension tubes are for the older Takumar super telephoto lenses like the 400/4, 600/4, 800/4 and the 1000/8 reflex that don’t use the bayonet lens mount.

04-04-2015, 10:27 AM   #3
Forum Member

Join Date: Feb 2013
Location: Schwarzwald
Photos: Albums
Posts: 73
Original Poster
Thank you, Phil.
The Autobellows has also this outer bayonett of the lenses you are mentioning. One of the extension tubes is needed, because the AE-Finder of the 67II is protruding and thus colliding with the bellows, whereas the prism finders of the 6x7 are not protruding. This is why Pentax recommends using one of the outer bayonet tubes when using the Autobellows.
It was hard to find them and when I found them, they where horrbly expensive: 200 €.....
04-04-2015, 02:07 PM   #4

Join Date: Feb 2009
Location: Arizona
Posts: 1,164
For mounting purposes, both tubes use white dots to align the flanges of the tubes with the lens mount. Not sure if the Autobellows has these dots. Both tubes have a small pin in the mounting face for turning the camera body, so that the camera orientation is rotated at 90, 180, 270 or 360 degrees correctly. These small pins are actually screws and they do come out and can be lost. I would guess that there were no more than 500 of these tube sets made.


  • 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!
645d, 645z, 67ii, autobellows, bay, camera, medium format, pentax, tubes
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ultra Rare 67 Accessory--Outer Bay Tube desertscape Pentax Medium Format 5 03-19-2015 11:53 AM
Macro My first macro photo using extension tubes. Susinok Post Your Photos! 5 04-04-2014 03:08 AM
Macro Photography using Extension Tubes disco_owner Photographic Technique 22 03-22-2014 03:55 PM
Outer Bay Tubes desertscape Pentax Medium Format 2 06-20-2012 01:12 AM
Questions: using extention tubes? OrenMc Pentax Camera and Field Accessories 4 03-04-2009 05:35 PM

All times are GMT -7. The time now is 09:44 AM. | 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]