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04-04-2015, 08:22 AM   #1
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Using outer bay tubes

Hi,
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
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Here is the link to the Pentax manual, the outer tubes are at the end:

http://c2b6d376b97bcc466063-5420c200a1f030d1394a9548df6eadbd.r5.cf2.rackcdn....252_manual.pdf

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.

Phil
04-04-2015, 10:27 AM   #3
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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
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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.

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