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Macro takumar 50mm F4 infinity focus issue
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PostPosted: Fri Feb 07, 2014 9:16 am    Post subject: Macro takumar 50mm F4 infinity focus issue Reply with quote

Hi , I have a macro takumar 50mm 1:1 macro lens, which function well and produce perfect result before about 5 meters, but from 5 meters to infinity it can't get focus. So it is really a regret for such a beautiful lens. I've disassembled it several times but can't get is right.

Does anyone give me any advice about it? thanks in advance.

I will try to upload some pictures about the lens later...


PostPosted: Fri Feb 07, 2014 11:40 am    Post subject: Reply with quote

On http://www.pentaxforums.com/lensreviews/S-M-C-Super-Macro-Takumar-50mm-F4.html is a scheme of
the lens. Maybe that helps you to check of all lenses are in the right direction.


PostPosted: Fri Feb 07, 2014 5:15 pm    Post subject: Reply with quote

Adapter may be too thick; acting as an extension tube for closer focus.

Do other lenses used with that M42 adapter achieve infinity focus?


PostPosted: Fri Feb 07, 2014 7:08 pm    Post subject: Reply with quote

Sam Steely wrote:
On http://www.pentaxforums.com/lensreviews/S-M-C-Super-Macro-Takumar-50mm-F4.html is a scheme of
the lens. Maybe that helps you to check of all lenses are in the right direction.


Sorry, but the SMC version is a different lens. A 1:2 macro, not 1:1 like the one mentioned. However, I don't recall how much they differ in optical design.


PostPosted: Sun Feb 09, 2014 6:51 am    Post subject: Reply with quote

Hi, Sam, visualopsins and Raffwal, thanks for you all. I try to reassemble the element and still no lucky yesterday. Maybe I should accept it and use it like this, anyway it is a MACRO lens. Laughing