3
Figure 1
. A) The 6” Classical Cassegrain’s Crayford focuser, top view. B) Both the drawtube tensioning and lock knobs are located on the
underside of the focuser.
Grip-ring
Coarse focus knob
Brass compression ring
1.25" adapter
Drawtube
Thumbscrew locks
2" accessary collar
Coarse focus knob
Millimeter and inch scales
Fine focus knob
Focuser attachment collar
Dovetail finder
scope bases
A
Drawtube
lock knob
Drawtube tension
adjustment knob
B
