This 81mm astronomy binocular delivers 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.
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|What are you going to look at with your binoculars?||Distant Object Using a Tripod|
|What size do you want your binoculars to be?||Tripod mounted|
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".
|Objective lens||D=70mm F=400mm ED Apochromatic, multi-coated||D=81mm F=480mm Achromatic, single coating with Mgfl|
|Light gathering power||100x||134x|
|Dimensions||L400 x W190 x H155||L480 x W190 x H155mm|
|Weight||4.0kg (8.8lb)||4.1kg (9lb)|
|Visual back||31.7mm push fit||31.7mm push fit|
|Eyepieces (optional)||SLV and LVW with 31.7mm are recommended excluding LV8-24 Zoom||SLV 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 BT-ED70S-A or BT81S-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 SXG-HAL130 or SXG-AL130 tripods. (73798 Swing Bracket required for use with BT-ED70S-A and BT81S-A.)
Maximum loading weight: 13kg
||73798 Swing Bracket for HF2 Mount
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.