A Linear Bearing Crayford design focuser for newtonian reflectors..
The friction can be adjusted with a large thumbscrew, a second thumbscrew can lock the focuser tightly in position. Features a 2" brass compression ring, adaptor from 2" to 1.25" with brass compression ring and 2" filter thread.
Ultra smooth focus motion with 10:1 Microfocus knob.
Has a load capacity up to 4.1kg. Base curve suits a 230mm (8" telescope) tube but can be packed for other size tubes.
Specifications (With Curved Base Plate):
• Minimum focuser height (without 1.25" adapter) = 77.5mm
• Maximum focuser height (without 1.25" adapter) = 128mm
• Tube travel = 50mm
• Drawtube outer diameter (cut-out in your telescope tube must exceed this) = 59mm
• Focuser weight (with 1.25" adapter) = 780gm