Process Nikkor 260mm F10 Supernatural Grand Lens

Process Nikkor 260mm F10

My first impression of the lens was WOW! Sugoi!! This is a big lens for wide lens.
One of the more exotic and rare lenses for the PROCESS NIKKOR series.
The Process Nikkor 260mm F10 consisted of four elements set, in a supernatural and black painted super wide barrel.

Do you know the usage of this lens?
The Process Nikkor is the lens for the big industrial camera over 8x10, 12X20 inch format.
An image circle is 800mm at F22 !!
Therefore, the lens is highly efficient.

The rim of the lens is engraved as "Process-NIKKOR 1:10 f=260mm Nippon Kogaku Japan" with white painted character.
Nippon Kogaku is sign of the high-end performance and optical engineer spirit.
Weight is 930 grams.
We called it Super Wide Ichiro-Lens.

There are the following 4 kinds of lenses in Process-NIKKOR.

- Process-NIKKOR 180mm F10 (Image area 540mm circle)
- Process-NIKKOR 210mm F10 (Image area 630mm circle)
- Process-NIKKOR 240mm F10 (Image area 720mm circle)
- Process-NIKKOR 260mm F10 (Image area 800mm circle)

You can see very beautiful and gorgeous full body of the great lens.
And, You can make the fantastic legend with this dream lens.

Specifications

Focal length 267mm
Max. aperture f/10
Min. aperture f/32
Lens construction 4 elements, 4 groups
Standard magnification 1 X
Standard wavelength 400 - 650 milli-micron
Image area 724mm circle at F10 (800mm circle at F22)
Subject area 724mm circle at F10 (800mm circle at F22)
Overall working distance 1068mm
Weight 930g