Vixen BT80M-A Instruction Manual

(Vixen)
BINOCULAR TELESCOPE - BT80M-A
Handle
Body Tube
Lens Shade
Obj ective
[ SPECIFICATIONS ]
Eyepiece
y Eyepiece Lock Ring
Focusing Ring
Prism Housing
Diagonal Prism Housing
Photo Tripod Adapte
Objective
Aperture : 80mm
Focal length : 900mm
Aperture ratio : 1:11.2
Optical composition: 2 air-spaced components
with built-in tele-extender
Coatings : Magenta-coated
Eyepiece
Optical composition: 2-group 4-element OR-25mm
Coatings : Multi-coated
Performance
Magnification : 36X
Angular field of view: 1.11 °
Linear field of view : 19m at 1000m
Exit pupil : 2.22mm
(Magnification can be changed variously by
using optional Vixen LV series eyepieces.)
Measurements
Size : Length - 58cm
Width - 19cm
Height - 21.5cm
Weight : 5kg
[ USING THE BINOCULAR TELESCOPE ]
(D <Instailing on a photo tripod>
Screw the photo tripod adapter on the pan head of the photo tripod.
(D <A1igning three dots>
Align the three dots marked on the eyepiece, focusing ring and prism housing in red for the
right side of the binocular telescope and in green for the left side. Optical axis is now
collimated, and focus is adjusted to infinity.
(D Adjusting the interpupi 1 lary distance>
Hold the right and left prism housings with your hands, and look through the binocular
telescope while turning those until one clear circle of image is seen.
@ <Focusing)
Close your left eye and look through the right eyepiece with your right eye. Rotate the
focusing ring of the right eyepiece until the image appears in sharp focus. Next, close
your right eye and look through the left eyepiece with your left eye. Rotate the focusing
ring of the left eyepiece until the image appears in sharp focus.
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