Strange "Asahi NC Takumar 3,3/300mm Pentax M42" on Ebay
parsons.david at gmail.com
Sat Jul 3 14:01:56 EDT 2010
How many stops is 256x?
On Sat, Jul 3, 2010 at 12:57 PM, Brendan MacRae
<brendanmacrae1969 at yahoo.com> wrote:
> ----- Original Message ----
>> From: Anthony Farr <farranthony at gmail.com>
>> To: Pentax-Discuss Mail List <pdml at pdml.net>
>> Sent: Sat, July 3, 2010 3:58:31 AM
>> Subject: Re: Strange "Asahi NC Takumar 3,3/300mm Pentax M42" on Ebay
>> "The mounting the tube seems also an original."
> Are you sure about
>> that? Compare the pictures at
>> the picture at the
>> can see that the historic pictures show a much shorter tube
> between the wide
>> part of the lens and the body of the image
> intensifier, with no obvious
>> tapering or visible bright metal. The
> ebay lens doesn't have any place
>> where an image intensifier could be
> placed according to the old
> regards, Anthony
> The Nocta is described pretty well in Oosten's "The Ultimate Asahi Pentax Screw Mount Guide 1952-1977," pgs 255-256. From the three pictures in this book, it appears as though the eBay lens is complete minus the larger focusing handle. A rare unit indeed.
> The description of lens from the book:
> "The lens is a highly specialized Takumar 1:3.3/300mm for Infrared photography. The minimum aperture is f/22, the angle of view is 8 degrees. It was supplied with a 256X Neutral Density filter (42mm) for use under daylight conditions. The actual front of the lens measures 300/3.3 = 91mm in diameter of which only the central part is used in daylight." - pg 255.
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