U.S. Navy “Big Eyes” Binoculars
BIG EYES 25/40/100 BINOCULARS
CHINESE MILITARY PATTERN – RUSSIAN OPTICS
This is the ultimate optical instrument for terrestrial observation. If you have a home with a view, enjoy it to the utmost with this magnificent instrument.
We use the term Big Eyes as it was applied to the U.S. Navy shipboard high powered, long range, binoculars of World War II. There is an unrelated company who has adopted Big Eyes as their company name.
Shown in a home enviornment
Presented is a wonderful high powered, long range “Big Eyes” binocular set that is in impeccable condition with very few visible signs of wear or use. The design is that of the Chinese Military Binoculars, with Russian optics. Everything works flawlessly in our simple tests. The images show sharp and bright and there are no visible imperfections in the optical system when looking backwards through the objective lens, or normally through the ocular lens. Because of the high power, the sighted object must be more than 50 yards distant to be brought into sharp focus.
The twin turrets have two eye pieces, the smaller one is 40mm, and the larger is 25mm. Because of the high power, the sighted object must be more than 50 yards distant to be brought into sharp focus. The two rotating ocular turrets allow wide-angle viewing at 25x, and high-power viewing at 40x. The apparent field of view, depending on the power selected, ranges from 52° to 62° which is very wide.
Side View Front View Top View
The binocular’s barrel is covered in traditional pebble-grain black, and its 1950’s era high quality wood tripod gives it the look of a military antique. Before the Chinese entered this arena, binoculars of this design and specifications were featured in national catalogs for $3995!
The two rotating ocular turrets allow wide-angle viewing at 25x, and high-power viewing at 40x. The apparent field of view, depending on the power selected, ranges from 52° to 62° which is very wide. It is a Giant having a viewing element over two feet in length and it weighs a hefty 26 1/2 lbs! For decades, only Carl Zeiss designed binoculars of this type and they were only available to the East German and Chinese militaries or in the after-market at much higher prices. When you see the quality of construction, and the quality of the optics, you’ll understand why, in the past, it could sell for such a high price. Comes complete with a sturdy wood tripod, metal tabletop tripod, and lightweight nylon form-fitted case.
CONDITION: There is very minor evidence of prior use or wear and can be considered as almost new in all respects. There is no paperwork or operator’s manual. There are no markings except for its Serial Number 3500351, and the power and size of the objective lenses. There is some minor marks on the outside cover, and the case shows age more than wear.
TYPICAL SPECIFICATIONS OF THE CHINESE MILITARY BINOCULAR
|Model||25/40 x100 standard|
|Objective size||100 mm or 4″|
|Magnification||25x and 40x|
|Prism||Porro / BAK4|
|Focal length||597 mm|
|Field of view at 1000m||25x- 44 m
40x- 26 m
|Angle of View||25x- 2.5º
|Exit Pupil distance||25x- 14 mm
40x- 8.2 mm
|Exit pupil diameter||25x- 4 mm
40x- 2.5 mm
|Inter-pupil distance||58-80 mm|
|Minimum focus distance||25 m|
|Packing||Nylon case – 28″ L x 14″ W x 11″ D|
|Erected weight||26.5 pounds|
|Tripod net weight||16.5 pounds|