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.
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.

Beautiful Macro Lens

CRT Nikkor 55mm F1.2 High Speed Macro Lens

Resolution

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.

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

You can mount the CRT Nikkor 55mm F1.2 lens on your Nikon SLR camera with L-F ring. Moreover, you can easily mount the lens on your Nikon Z 7 or Nikon Z 6 with the Leica mount adapter.

Precise extra-long Leica-mount thread

The CRT Nikkor has an extra-long, Leica-mount thread and is supplied with a jam nut.

Yes, LENS MADE IN JAPAN

Early Model and Later Model

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

Left Early Model and Right Later Model

Friendly Lens CRT Nikkor 55mm F1.2

Specifications

CRT Nikkor 55mm F1.2

Focal length :  54.3 mm
Max. aperture :  f/1.2 (infinity)
Max. aperture :  f/1.4 (at 1/5X)
Min. aperture :  f/11
Aperture scale :  1.2, 2, 2.8, 4, 5.6, 8, 11
Lens construction :  8 elements in 6 groups
Standard magnification :  1/5X
Range of magnification ratio :  1/4X - 1/5.5X
Picture angle :  37.2°
Standard wavelength :  400 nm - 650 nm
Vignetting :  0% at F4
Distortion :  +0.14%
Resolution :  250 lines/mm
Image area :  24 mm X 36 mm
Image area :  43.2 mm⌀
Object area :  216 mm⌀ (1/5X)
Overall working distance :  417.1 mm
Filter size :  d=52 mm P=0.75 mm
Mount :  Leica L39 screw mount
Length :  64 mm
Diameter :  54 mm
Weight :  385 g
Actual weight :  296.5 g    No. 721527  (early model)
Actual weight :  305.0 g    No. 820972  (later model)

Release date :  1967
Price :
  115,000 Japanese YEN (1974)
  115,000 Japanese YEN (1976)
  115,000 Japanese YEN (1977)

CRT Nikkor 55mm F1.2 Lens Construction

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

From the Nikon Museum 2018 Special Exhibition

CRT Nikkor 50mm F1.2 and other very rare prototype lenses were exhibited in "Prototype Lenses" so I would like to introduce to you.

Fisheye Lens and Special Purpose Lens Collection

Nikkor-O Auto 50mm F1.2 - 1.4 1963

Nikkor-O Auto 50mm F1.2 - 1.4 No. 720012

Nikon Z Album

I mounted the CRT Nikkor 55mm F1.2 lens on my Nikon Z 6 and took the following pictures. The CRT Nikkor 55mm F1.2 lens produce very nice images at long distances.

CRT Nikkor 55mm F1.2 on Nikon Z 6

The following adapters were connected to the CRT Nikkor 55mm F1.2 to get infinity.

L39 to Z Mount Adapter (K&F CONCEPT)
CRT Nikkor 55mm F1.2

Nikon Z 6 + L39 to Z + CRT Nikkor 55mm F1.2

CRT Nikkor 55mm F1.2,   ASA 400   F8   1/1600 sec.   +0.3

CRT Nikkor 55mm F1.2,   ASA 400   F8   1/500 sec.   -0 +0

CRT Nikkor 55mm F1.2,   ASA 800   F8   1/640 sec.   -0.7

I shot the same scene with aperture F8 and aperture F1.2. The world of full wide open aperture F1.2 is poetic and beautiful. Take a look at the below pictutes.

CRT Nikkor 55mm F1.2,   ASA 1600   F8   1/500 sec.   -0.7

CRT Nikkor 55mm F1.2,   ASA 200   F1.2   1/1600 sec.   -0 +0

CRT Nikkor 55mm F1.2 on Nikon Z 6

The Highest Peak of Macro Photography

The CRT Nikkor 55mm F1.2 lens have an amazing kind of rendition, clean and with great micro contrast. The CRT Nikkor 55mm F1.2 lens with great micro contrast has much richer colors and tone transitions compared to a general-purpose lens.

CRT Nikkor 55mm F1.2,   ASA 1600   F8   1/800 sec.   -1.0

CRT Nikkor 55mm F1.2,   ASA 1600   F8   1/1000 sec.   -0.3

CRT Nikkor 55mm F1.2,   ASA 1600   F8   1/1250 sec.   -1.0

CRT Nikkor 55mm F1.2,   ASA 1600   F8   1/1000 sec.   -0 +0

CRT Nikkor 55mm F1.2 Lens Look Good on the Nikon Z

Nikon style when shooting sunflowers. For a close-up shot, I put in one short intermediate ring with a Leica screw mount.

Sakura and CRT Nikkor

I set the aperture to F5.6 and took a picture of the Sakura cherry blossoms. This lens is good at precise depiction. As you can see, the color expression is also extremely excellent.

CRT Nikkor 55mm F1.2,   ASA 800   F5.6   1/2000 sec.   +2.0

CRT Nikkor 55mm F1.2,   ASA 800   F5.6   1/1250 sec.   +1.7

CRT Nikkor 55mm F1.2,   ASA 800   F5.6   1/1250 sec.   +1.7

CRT Nikkor 55mm F1.2

This is the Nikon camera when I shot the Sakura cherry blossoms. Compact and light despite being a high-performance lens. For close-up photography, I put in an extension ring, which is a regular accessory for EL Nikkor lenses.