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Pentax Ultra-Achromatic Takumar 85mm f/4.5

Posted 07/11/2011 - 11:12 Link
I just read an interesting article about this lens, and was wondering if anyone had one? It's an M42 mount lens, made between 1968-1975.I can't find any for sale anywehere, I quite fancy one but have no idea how much they cost. Does anyone have any more info on this lens, or any idea where I could find one?
Posted 07/11/2011 - 11:17 Link
There was someone on here that was very interested in
these. Can't remember the name and I'm not sure if he
actually owned one?
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Posted 07/11/2011 - 13:06 Link
There are a handful of specialised scientific/law enforcement lenses that use entirely quartz instead of glass or a mixture of quartz and glass elements.

Quartz-Takumar 85mm f3.5
Ultra-Achromatic Takumar 85mm f4.5
Ultra-Achromatic Takumar 300mm f5.6

They are highly corrected and intended for UV and IR photography. Because coating absorb UV these lenses are uncoated.

They are very rare and very expensive when they become available.

Source: The Ultimate Asahi Pentax Screw Mount Guide 1952-1977 by Gerjan van Oosten.
Best regards, John
Posted 08/11/2011 - 06:05 Link
Thanks John! it was the use for IR photography that got me interested. Sounds like it might be out of my budget range though! Seems like a very interesting lens nonetheless. I didn't realize the elements were made from quartz.

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