Ultra Micro Nikkor 155mm Amida Turbo Lens

Ultra Micro Nikkor 155mm F4, Meet the Amida Imagine

Ultra Micro Nikkor 155mm F4, Full Outfit, with Wooden Box

Ultra-Micro-Nikkor 155mm F4

One of the extra gland lens for the Ultra-Micro-Nikkor series.
Someone said that it is the Amida Imagine of the Far East.
It was introduced in the 1960's latter period from Nippon Kogaku, Japan.
The Ultra-Micro-Nikkor 155mm F4 consisted of seven elements set in a black painted barrel with special 72mm screw thread.
The rim of the lens is engraved as " β=1/10" with red character.
The Ultra-Micro-Nikkor 155mm F4 used 72mm accessories.
A Nikon 72mm filter, for example, a Nikon 72mm L37C filter is just fit to it.
You can see very beautiful and mysterious purple coating on the lens.

Its large 80mm circle image area ideally suits it to the making of photomasks for large pattern unit LSI manufacturing processes.
With its standard 1/10 magnification, the lens guarantees resolving power of 200 lines/mm over a 80mm circle image area, 300 lines/mm or more over a 56mm circle image area.

Specifications

Focal length 154.4mm
Max. aperture f/11
Lens construction 7 elements, 4 groups
Standard magnification 1/10X
Standard wavelength 546 milli-micron (e-line)
Vignettings 0 %
Distortion +0.02% (56mm circle)
Distortion -0.03% (80mm circle)
Aerical resolving power 300 lines/mm (F4)
Aerical resolving power 200 lines/mm (F5.6)
Image area 56mm circle (F4)
Image area 80mm circle (F5.6)
Subject area 560mm circle (F4)
Subject area 800mm circle (F5.6)
Overall working distance 1822mm
Weight 1,090g

Ultra Micro Nikkor 155mm F4, High Resolution Super Turbo Lens