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08-01-2017, 05:27 PM   #1
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SMC Takumar - Zoom 135 - 600 f6.7 Lens


I have just acquired an SMC Takumar - Zoom, 135 - 600mm f6.7 Lens, S/N 6375960.
My query is what is the thumb screw for on the removable part of the claw that is first attached to the camera before the remainder of the lens is fitted?
A friend has a lens the same and it has the same thumb screw for which we cannot find any function.


08-01-2017, 05:33 PM   #2
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Just a guess: does it lock/unlock the collar so the lens and camera can rotate between portrait and landscape orientation?
08-01-2017, 05:56 PM   #3
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08-01-2017, 06:11 PM   #4
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have a picture of said thumbwheel?

08-01-2017, 08:37 PM - 1 Like   #5
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It's to remove the camera mount, or adjust the rotation of the body for vertical shots. It also is where you mount the filter.

Here is the K mount manual for the same lens:


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