Chinese Binoculars
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25x100 FB is for the amateur astronomers who are experienced in using binoculars.  The major difference between 25x100 FB and the 70, 80 and 90mm binoculars is the prism housing.  The 25x100 FB's has better prism mount so that the front prism and rear prism are in much better alignment.  Also, with the 25x100 FB prism housing, the objetive tubes are in perfect parallel positioning with eyepieces.  The point is that the better collimation, the minimum prism light cutoff and more even focus are achieved.  

Another major improvement is the blackened inside of the objective tubes.  It doesn't use the common anti-dust paper with sticky oil to trap the dust and dirt - this makes the inside surfaces reflective and shiny.  Instead, all internal surfaces of 25x100 FB are sprayed with a non-reflective black paint before assembly to decrease the reflection and increaser the contrast.  This feature is only see in a few very high-end German and Japanese models.

25x100 FB has a rubberized all-metal body with hinged central bar as the mount.  The design itself is more waterproof and shock-resistent than most of the giant binoculars.  It's individual focus, 4.6 kgs in weight and 44.6 cm long.  It's fully multi-coated and has accessible collimation screws.

Objective size 100mm
Magnification 25x
Prism BAK4
Optic coating Broadband fully multi-coated
Long eyes relief Yes

Body Length

กก45 cm
Body coverings Rubberized
Field of view 2.5กใ
Exit pupil diameter 4mm
Exit pupil distance 18mm
Minimum focus distance 38m
Net weight 4.6 kg
Packing  set in polyethylene box, then loaded into a soft nylon case. 
Optional aluminum case  Available

Other 80mm giant binoculars models available are: 25/40x100 standard, 25/40x100 painted, 25x100 or 40x100 45 deg. , 25/62x100 helical focuser, 25/40x100 coin-op and  22x100 astronomical.

We don't retail. We only sell to the dealers and wholesalers.

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Kunming Optical Instruments Co., Ltd.
Add:Rm. 603, Bldg. No.2, Bai Ma Gao Ceng,
No. 285, Dan Xia Rd.,
Kunming, Yunnan, China. Zip Code: 650118
Tel: +86-871-5411184 Fax: +86-871-5411040 Email:
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