Vixen's newest astronomy binoculars deliver crystal clear, sharp views through its new optical design. Its lightweight body ensures that you can take it to any observing location.
The air-spaced doublet optics in this 81mm are magnesium fluoride coated to help reduce the effects of chromatic aberration.
Mounting the binoculars is a simple process as they come supplied with a Vixen dovetail mounting bar for use with equatorial or altaz mounts. The dovetail bar also has 1/4" thread sockets for use with conventional tripod panheads.
An optional altaz fork mount is available and allows the binoculars to be used on the optional SX-HAL130 or SXG-HAL130 tripods. These provide a stable but lightweight tripod base for this excellent "space binocular".
The BT125-A binocular features a pair of 125mm achromatic objective lenses at f6.1 and 760mm focal length. As with the BT81S, the 45° angled eyepiece holders make for comfortable viewing of the night sky or of distant terrestrial objects. The individually-focused eyepiece holders accept 1.25" eyepieces.
Mounting options are the same as for the BT81-S.
|Objective lens||81mm achromatic, magnesium fluoride coating||125mm achromatic, multi-coated|
|Focal length (Focal ratio)||480mm (f5.9)||760mm (f6.1)|
|Resolving power, limiting magnitude||1.43 arc sec., 11.3||0.93 arc sec., 12.3|
|Light gathering power||134x||319x|
|Dimensions||L480 x W190 x H155mm||L630 x W360mm|
|Weight||4.1kg (9lb)||10.9kg (24lb)|
|Visual back||31.7mm push fit||31.7mm push fit|
|Eyepieces (optional)||NLV and LVW with 31.7mm are recommended excluding LV8-24 Zoom||NLV and LVW with 31.7mm are recommended excluding LV8-24 Zoom|
|Accessories included||Finder bracket shoe, carry handle & dew shields||Finder bracket shoe, carry handle & dew shields|
Note: The BT81S-A is not designed for viewing at high magnification. Use of eyepieces with focal length shorter than 10mm is not recommended. Eyepieces are not supplied as standard with the BT81S-A and BT125-A.
|78062 HF2 Fork Mount
Provides an easy-to-use friction controlled altazimuthal mounting for the Vixen range of astronomy binoculars and other optical devices. The fork mount comes complete with a half-pillar to raise the binoculars to a comfortable viewing height. Fits onto the SX-HAL130 or SXG-HAL130 tripods. Requires the 73798 Mount Plate.
Maximum loading weight: 13kg
|73798 Mount Plate
Required to allow the 78062 Fork Mount to be used with astronomy binoculars and any other optical devices which have a 1/4" screw thread socket.
Please note: BT81S-A and BT125-A binoculars are available to special order only