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This package consists of HF2 Alt-Azimuth Fork Mount, BT81S-A Binocular Telescope, SXG-HAL130 aluminum tripod, Swing Bracket and a pair of SLV20mm eyepieces.
The BT81S-A is not designed for viewing at high magnification. Use of the eyepieces with focal length shorter than 10mm is not recommendable.
BT81S-A Vixen astronomical binocular (eyepieces and mount sold separately). Features 81 mm achromatic lens, 480 mm focal lenght.
|Objective lens||81mm Achromatic, Single coating with Mgfl|
|Focal length(Focal ratio)|
Resolving power /
|Limiting magnitude||1.43 arc seconds / 11.3|
|Light gathering power|
134x unaided eye
|Size / Weight||480mmL x 190mmW x 155mmH / 4.1kg|
|Interpupillary distance||58mm to 102mm|
|Visual back||31.7mm push-fit|
|Accessory||Finder bracket shoe*1|
|Mount||Alt-azimuth fork mount,|
Vertical and horizontal friction controls
|Maximum loading weight||13 kg / 28.6 ld|
|Weight||3.4 kg (Without tripod)|