Specifications, About the crayford focuser – Vixen ED100Sf User Manual
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SPECIFICATIONS
Specifications
ED80Sf
ED100Sf
Item #
3228
3229
Optical Design
ED APOchromatic Refractor
Effective Aperture
80mm
100mm
Focal Length
600mm (f/7.5)
900mm (f/9.0)
Resolving Power
1.45 arc.; 11.3
1.16 arc sec; 11.8
Light Gathering Power
131x
204x
Tube Diameter, Length & Weight
100mmx570mm; 3.4 kg
100mm x 880mm; 3.7kg
Finderscope
9x50mm
9x50mm
Threads
60mm, 42mm threaded for T‐ring/50.8mm, 31.7mm push‐fit for T
ring/31.7mm push‐fit
Accessories
Flip Mirror, Aluminum Carry Case, Mount Rings, Dovetail Plate
Photography
Total Weight
8.9kg 19.6 lbs total weight
11.5 kg 25.3 lbs total w/case
7.5 lbs optical tube
8.2 lbs optical tube
ABOUT THE CRAYFORD FOCUSER
Both the ED80Sf and ED100Sf telescopes have the Crayford focuser which uses friction for the focusing
mechanism. Follow these instructions for its use.
Tighten the tension adjustment screw if the drawtube is loose.
Even with the tension knob fully tightened , it is possible , though not recommended, to rotate the
focus knobs.
Never apply lubricant to the focuser.
MrStarGuy, Inc. 1010 Calle Cordillera, San Clemente, CA 92673
www.vixenoptics.com