VIXEN
A70Lf, A80Mf, R130Sf
Vixen Optics a Division of MrStarGuy, Inc.
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ATTACHING THE FINDER SCOPE (A70Lf)
1. Loosen the
chrome finder
bracket lock
screw on the
telescope.
2. Attach the finder
scope as shown in
the figure.
Tighten the finder
bracket lock screw
securely.
ATTACHING THE FINDER SCOPE (A80Mf OR R130Sf)
Back out the two
adjustment screws on
the finder bracket to
allow passage of the
finder scope. (Make
sure the adjustment
screws do not fall off
the bracket.)
Slide the rubber O‐ring onto the eyepiece end of the
finder. There are two grooves on the finder tube.
Position the O‐ring on the narrow groove at the middle
of the finder scope.
One Pin does not
screw in/out on some
models.
Pull up the fixed stud
on the bracket ring so
that the finder tube
can slide into the
Tihten the two
adjustment screws so
that the finder scope is
aligned as shown in the
figure.
bracket ring from its
eyepiece end.
Release the fixed stud
into the wide groove
on the finder tube.
Loosen the finder
bracket lock screws
on the telescope.
Attach the finder bracket
as shown in the figure on
the right. Tighten the
finder bracket lock screw
securely.
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HOW TO ALIGN THE FINDER SCOPE- Be sure to align the finder scope with the telescope before
you start observing.
ALIGNING THE FINDER SCOPE – A70Lf
*Choose a conspicuous target in the distance and place
the target in the center of the field of view of the
telescope. In the illustration, a distant tower is brought
into the center of the field of view of the telescope.
*Next, look through the finder scope. You should find
the same target within the finder’s field of view. In the
illustration, the tower is seen in the upper right of the
finder’s field of view.
*Align the optical axis (field of view) of the finder
scope with the optical axis (field of view) of the
telescope. Adjust the finder scope by loosening or
tightening two or three adjustment screws at a time in
turn until the target is in the same position, in the
center of the cross hairs. In the illustration, the top of
the tower is in the center of the crosshairs. The top of
the can be moved toward the center of the crosshairs
by loosening the adjustment screw A, B and tightening
the adjustment screw C.
ALIGNING THE FINDER SCOPE – A80Mf or R130Sf
*Choose a conspicuous target in the distance and place
the target in the center of the field of view of the
telescope. In the illustration, a distant tower is broug
into the center of the field of view of the telescope.
*Next, look through the finder scope. You should find
the same target within the finder’s field of viewn the
illustration, the tower is seen in the upper right of the
finder’s field of view.
Align the optical axis (field of view) of the finder scope
with the optical axis (field of viewof the telescope.
Adjust the finder scope by losening or tightening the
adjustment screws A and B in turn until the target is in
the same position, in the center of the crosshairs.
The top of the can be moved toward the center of the
crosshairs by loosening the adjustment screw A and
tightening the adjustment screw B.
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ACCESSORY CHART
A70Sf, A80Sf and R130Sf Visual configuration
A70Sf, A80Sf and R130Sf Photographic configuration
SPECIFICATIONS- The Specifications are subject to change without notice.
Specifications
Item #
A70Lf
A80Mf
R130Sf
22
2603
2604
Optical Design
Effective Aperture
Focal Length
Resolving Power
Light Gathering Power
Tube Diameter, Length & Weight
Finderscope
Achrmatic Refractor
0mm
900mm (f/12.9)
1.66 arc.; 11.0
100x
Newtonian Reflector
130mm
650mm (f/5.0)
0.89 arc sec; 12.3
345x
80mm
600mm (f/7.5)
1.45 arc sec; 11.3
131x
90mm x 860mm; 2.5kg
6x30mm
76mmx865mm; 1.9 kg
6x42mm
160mm x 572mm; 4.0 kg
Threads
Magnification
Accessories
42mm for T ring/31.7mm push‐fit
PL20mm, PL6.3mm
Round Tray, Diagonal Prism
PL20mm, PL6.3mm
8 kg
PL20mm, PL6.3mm
Round Tray
Photography
Total Weight
7.4kg
8.9kg
Magnification equals focal length/Eyepiece
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COLLIMATION
The optics of the telescope are aligned correctly at Vixen’s factory before shipment. It is rare that
telescopes go out of alignment, unless its tube is knocked strongly. Follow procedure below to
determine if the telescope is out of collimation.
Examine the Collimation
Select a second‐ or third‐magnitude star and place it the center of the telescope’s field of view by using
a moderately high power eyepiece. Focus the star precisely. And then defocus slightly and you will look
for striped patterns that surround the star. If the striped pattern can be seen as a concentric image,
your telescope is properly aligned
Collimated Properly
In Focus Out of Focus
Mis‐Collimated
In Focus
Out of Focus
MrStarGuy, Inc. 1010 Calle Cordillera, San Clemente, CA 92673
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