The SMCT and SMCP 135 f2.5 lenses are more identical in proprotions than
any other pair m42 and early K twins, except for the mount and rings.
The base on the Takumar is quite wide, just as wide as that on then
Pentax K. It entirely covers the K mount body flange when mounted with
an adapter, (and overhangs the body flange on an M42 lens quite a bit as
well).
Shel Belinkoff wrote:
>Really? That surprises me as I thought the SMCT mounting was the same as
>the ST. They are both M42 lenses. What's the difference between them?
>
>Shel
>
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>>[Original Message]
>>From: P. J. Alling
>>
>>
>
>
>
>>Nothing I know of, but then again the only M42 lens I'm likely to use on
>>a digital camera is the SMCT 135 f2.5 which covers the contacts nicely.
>>
>>Shel Belinkoff wrote:
>>
>>
>>
>>>In another thread JCO and Adam
>>>are going at it about how easy/difficult it
>>>may be to focus the DSLR's with an
>>>M42 lens stopped down. I decided to see
>>>for myself how hard it would be to focus
>>>(it's not at all difficult). In
>>>so doing I could see that the various contacts
>>>on the lens mount were
>>>exposed. Is there some way to cover those
>>> contacts while using a screw
>>>mount lens? Any suggestions?
>>>
>>>
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--
Things should be made as simple as possible -- but no simpler.
--Albert Einstein
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