CRT Nikkor 55mm F1.2 High Speed Macro Lens
CRT Nikkor 55mm F1.2 High Speed Macro Lens

CRT Nikkor 55mm F1.2 Nippon Kogaku Special High Speed Macro Lens

Features of CRT Nikkor

The CRT Nikkor is a relatively high resolution lens for display of data from oscilloscope or other CRT traces.
Transmission of P-11 phosphor traces is 95 percent; for P-20, 100 percent.
Aberrations are corrected at its standard magnification of 1/5X, and the lens is designed for use within a very narrow range around that magnification.
Within the 24x36 mm film, vignetting is insignificant in CRT reproduction applications.
It should be noted that at its standard magnification of 1/5X the nominal F1.2 speed of the lens is reduced to F1.4.
The CRT Nikkor has an extra-long, Leica-mount thread and is supplied with a jum nut.

Beautiful Macro Lens

CRT Nikkor 55mm F1.2 High Speed Macro Lens


CRT Nikkor 55mm F1.2

Focal length :  54.3 mm
Max. aperture :  f/1.2
Min. aperture :  f/11
Lens construction :  8 elements in 6 groups
Standard magnification :  1/5.5X - 1/4X
Standard wavelength :  400 nm - 650 nm
Vignettings :  0%
Distortion :  0.14%
Resolution :  250 lines/mm
Image area :  24 mm X 36 mm
Overall working distance :  417.1 mm
Weight :  385 g
Price :  115,000 Japanese YEN (1974)

CRT Nikkor 55mm F1.2 on the Lens Configuration Diagram


Recorded for full CRT screen; high density target on clear background, filling full acceptance cone of lens with flare producing illumination.
High density background target and High Contrast Copy Film, up to 250 lines/mm possible.


Early Model and Later Model

A Left lens is the CRT Nikkor 55mm F1.2 Early model Named Nippon Kogaku Japan.
A right lens is the CRT Nikkor 55mm F1.2 Later model Named Nikon with red point M=1/5.

Left Early Model and Right Later Model

Friendly Lens CRT Nikkor 55mm F1.2

Mechanical Mount Available

Barrel, extra long Leica thread with jam nut.
You can mount the lens on your Nikon camera with L-F ring.
Moreover, if you have the Leica L39 ring, the mount can be done also to Canon, Minolta, Miranda, ALPA and Zunow.

Nikon SLR Camera and CRT Nikkor 55mm F1.2 Lens


Copyright Michio Akiyama, Tokyo Japan 2001, 2019