Vixen BT81S-A Binoculars
The Vixen BT81S-A Binoculars 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.
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
Model BT81S-A
Objective lens D=81mm F=480mm Achromatic, single coating with Mgfl
Limiting magnitude 11.3
Light gathering power 134x
Dimensions L480 x W190 x H155mm
Weight 4.1kg (9lb)
Visual back 31.7mm push fit
Eyepieces (optional) SLV and LVW with 31.7mm are recommended excluding LV8-24 Zoom
Accessories included Finder bracket shoe, carry handle & dew shields