Vixen BT-ED70S-A Instruction Manual

Instruction Manual for BT-ED70S-A Binocular Telescope
Thank you for your purchase of a Vixen BT-ED70S-A Binocular Telescope. This manual applies to the BT-ED70S-A Binocular Telescope.
Be sure to read instructions for the mount and tripod along with this manual if you purchased the product as a complete package.
* For observing, two 31.7mm (1.25-inch) eyepieces of the same focal length are required as they are not included.
* A pair of the eyepieces may be included if you purchase a complete package consisting of the BT-ED70S-A, HF2 Altazimuth Fork Mount and
SXG-HAL130 tripod.
WARNING!
CAUTION
Do not leave the product uncapped in daytime. It may cause passing
sunlight through the objective lens of the optical tube, resulting in fire.
Do not use the product while transporting or walking, as injuries may
arise from stumbling, falling or collision with objects.
Keep plastic and vinyl packing materials away from children; these may
cause danger from swallowing or suffocation.
SPECIFICATIONS
The sp ec i f i ca ti on s ar e su b je c t t o ch a n g e wit h o u t n o tice .
ED Apochromatic
Objective lens
Optical coating Multi-coating
Effective aperture 70mm
Focal length (Focal ratio) 400mm (F/5.7)
Resolving power 1.66 arc seconds
Limiting magnitude 11.0
100x
Light gathering power
Friction fit type
Eyepiece holders
NLV series of 31.7mm size or LVW series
Eyepieces applicable
(Optional) of 31.7mm size
Interpupillary distance 58mm to 102mm
Optional Finder scopes 7x50mm finder scope & bracket or X-Y
red dot finder
Mount block / Threads Dovetail bar for SX/GP
1/4-inch x 2 & 3/8-inch x 1
Threaded sockets
400mm L x 190mm W x 155mm H, 4.0kg (8.81 lbs)
Size & weight
About eyepieces applicable to BT-ED70S-A
The removable eyepieces can be swapped for other Vixen NLV or LVW
series of 31.7mm-size eyepieces, but if the eyepieces with high magnification
are used, it may give rise to misalignment that is become detectable due to
its high magnification. It is always recommendable to use the eyepieces
with focal length longer than 10mm for observing to avoid it.
COMPONENTS
Carry Handle
Optical Tube
Dew Shield
Objective Lens
(inside)
Never look directly at the sun with your naked eyes or through this product or its
finder scope available. Permanent and irreversible eye damage may result.
HANDLING・ STORAGE
Do not leave the product inside a car in bright sunshine, or in hot places. Keep any
strong heat radiation sources away from the product.
Do not exposure the product to rain, water drops, dirt or sand.
When cleaning, do not use solvent such as paint thinners.
Avoid touching any lens surfaces directly with fingers. If a lens becomes dirty with
fingerprints or general smears, gently wipe it using a commercially available lens
leaner and a lens cleaning paper, or consult your local Vixen dealer.
For storage, keep the product in dry places, and do not expose to direct sunlight.
BT-ED70S-A Shown with the Fork Mount,
Tripod and other Optional Accessories available separately
7x50 Finder Scope
(Optional)
Objective Cap
BT-ED70S-A
Threded sockets
for camera tripod
XY Finder bracket
(Optional)
Eyepieces
(Optional)
Swing Bracket
(Optional)
HF2 Fork mount
(Optional)
SXG-HAL130 Tripod(Optional)
Eyepiece Holders
Prism Housing
45-degree Angled
Finder-bracket Shoe
Friction Fit
Focus Ring
Dovetail Bar