That should be M42 mount lens, of course.
P. J. Alling wrote:
> With an adapter. 645 is the designation for one of Pentax's two lines
> of medium format SLRs. The lens will work much like an M43 mount lens
> on K mount cameras.
>
> Charles Wilson wrote:
>
>> Can anyone tell me what the designation (645) means after a lens. Will this
>> lens fit on my digital ist D.
>>
>> Regards
>>
>>
>> Charles Wilson
>> Sydney Australia
>>
>>
>>
>>
>>
>
>
>
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difference between Harvard University and the Harvard University football team.
-- P. J. O'Roark
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