With Japanese-made 81mm air-spaced doublet optics, magnesium fluoride coatings and 45-degree prism-blocks this is an excellent binocular for astronomy or long distance terrestrial observing. 

The eyepiece holders are set at 45-degrees for comfortable observing. This is particularly beneficial when using the binocular for astronomy.  

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.

Eyepieces are not supplied as standard with this binocular.

Most astronomy eyepieces with 1.25" barrels and 10mm (48x) to 40mm (12x) focal lengths will work well. Vixen SLV eyepieces are an excellent match.

Optional Accessories

	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. Weight: 3.4kg 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.

Product Specifications

BT81S-A Binocular Telescope Questions & Answers

Please fill in the form below to ask a question.