Manufacturers & Suppliers of Astronomical Telescopes in India Serving Amateur Astronomers Since 1976
Manufacturers & Suppliers of Astronomical Telescopes in India Serving Amateur Astronomers Since 1976
This very high quality, dual-speed Crayford focuser for reflector telescopes from Guan Sheng Optical (GSO) is a joy to use. You will wonder how you ever lived without it once you install it! It will make achieving precise focus for visual observations and astrophotography a breeze and you will experience very smooth and precisely controlled focuser motion with zero backlash and zero image shift.
Focuser Specifications (With Curved Base Plate):
Minimum focuser height (with 1.25" adapter) = 3.27" (83mm)
Maximum focuser height (with 1.25" adapter) = 4.84" (123mm)
Minimum focuser height (without 1.25" adapter) = 2.87" (73mm)
Maximum focuser height (without 1.25" adapter) = 4.45" (113mm)
Tube travel = 1.57" (40mm)
Drawtube outer diameter (cut-out in your telescope tube must exceed this) = 2.29" (58.1mm)
Focuser weight (with 1.25" adapter) = 1lb-10.5oz (751gm)
Focus knob diameter = 1.57" (40mm)
Microfocuser knob diameter = 1.02" (26mm)
Microfocuser reduction ratio = 1:10
Maximum outer body diameter = 3.15" (80mm)
Millimeter markings on focuser drawtube: No
Rotatable: No (But body can be rotated by loosening two allen screws that connect the focuser to the base plate)
Dust plug: One 1.25" dust plug included
2" to 1.25" adaptor with compression ring and 2" filter thread
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STARTRACKER [ India ]
EXPLORE SCIENTIFIC [ USA ]
G.S.O. [ Taiwan ]
Goto Mounts / Tripods [ U.S.A ]
BRESSER [ Germany ]
William Optics [ Taiwan ]
Founder Optics [ Taiwan ]
MEADE [ U.S.A ]
CELESTRON [ U.S.A ]
K-SON [ Telescopes ]
S V Bony [ China ]
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