Guys,
Need a bit of help.....
For the SHG prototype I used a 2" SCT Crayford focuser (this is used with 2" fittings - no 2" to 1.25" adaptor...)
The overall length (minimum) from the mounting face to the end of the drawtube is 75mm.
Due to a screw up on my part(!!???) I can't get a good clean focus....I need about 5-10mm further inward movement.
There are no optics I can move to compensate, so a shorter 2" 10:1 geared focuser which either fits a flat base or a SCT thread is what I need.
My question: Has the Newtonian Crayford focuser a shorter closed length say around 65mm???
http://www.bintel.com.au/Accessories...oductview.aspx
Anyone know if this is available with a flat mounting base plate?
Any other ideas....???