Chinese Binoculars
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45-degree BT 100 on fork mount is the long-awaited 45 degree version of straight-through 25/62x100. This is by far the most user-friendly binocular specifically designed and made for amateur astronomers - hopefully, the 45-degree together with the new factory fork mount will get rid of the back and neck strain while the users pointing the binocular all the way up to the zenith.

The same as 25/62x100, the non-proprietary 1.25" helica focuser is used to accept all standard 1.25" eyepieces - this is the major difference from 20/26/32x88 with the proprietary focuser which only accepts the factory eyepieces 20x, 26x and 32x.

The binocular comes with a wooden or aluminum tripod, the fork mount, a pair of factory 25x eyepieces and a traveller-style carrying case. The optional accessories include the 7x50 finderscope. The 15x, 40x, 60x and 125x eyepieces are under development and will be available in this June. 

Pricing: Our wholesales prices are kind of case sensitive and so are not published on the site. If you're a serious dealer or wholesaler, please email for the wholesales prices. To save time for both of us, you're recommended to read Initial contact first.

Objective size 100mm
Ocular 45 degree 1.25" non-proprietary helical focuser
standard factory eyepiece 25x eyepieces
Body covering & color  painted, silver or champagne finish 

Overall dimension

Prism BAK4
Optic coating Broadband fully multi-coated
Field of view at 1000m 25x-2.5 deg.
Exit pupil diameter 25x-3.6mm  
Exit pupil distance 25x-14mm  
Resolution 3"
Diopter adjustment -5 to +5 diopters
Focal length 597mm
Inter-pupil distance 56-74mm
Finderscope 7x50, optional
Net weight of body   13 kgs
Fork Mount
Horizontal azimuth angle 360 degree
Elevation angle  90 degree
Depression angle 15 degree



Other 100mm giant binoculars models available are: 25/40x100 painted, 25/40x100 standard, 25/40x100 coin-op, 25x100 FB 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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