Good 1.25" low-profile focuser for imaging

My younger son does a fair amount of webcam imaging with his homemade 5"
f/11.4 reflector (GEM mounted), and he currently is using an old UO helical
focuser. We are looking for a better (e.g. non-rotating) focuser, and are
considering the JMI NGF-mini3 Crayford. Any comments, pro/con on this
focuser? Any other recommendations? Thanks.

Dennis

p.s. He doesn't want to switch to a SCT, so don't even mention it!

"Dennis Woos" wrote in message
...
My younger son does a fair amount of webcam imaging with his homemade 5"
f/11.4 reflector (GEM mounted), and he currently is using an old UO
helical
focuser. We are looking for a better (e.g. non-rotating) focuser, and are
considering the JMI NGF-mini3 Crayford. Any comments, pro/con on this
focuser? Any other recommendations? Thanks.

Dennis

p.s. He doesn't want to switch to a SCT, so don't even mention it!



A word of warning (sort of). The JMI focusers have different sized bases.
The smallest JMI focuser actually has a larger base than a slightly more
expensive model. I ran into this during a discussion with one of the guys at
JMI. Since you are talking reflector, it is likely not a problem, but if
there is something else mounted to the tube close to the current focuser,
you might need to bare this in mind. Good Luck!

Tom

Dennis Woos wrote:
My younger son does a fair amount of webcam imaging with his homemade 5"
f/11.4 reflector (GEM mounted), and he currently is using an old UO helical
focuser. We are looking for a better (e.g. non-rotating) focuser, and are
considering the JMI NGF-mini3 Crayford. Any comments, pro/con on this
focuser? Any other recommendations? Thanks.

Dennis

p.s. He doesn't want to switch to a SCT, so don't even mention it!

This might help, just as an add-on to what he's got (some rotate, others
don't e.g. #7315):

http://www.sciencecenter.net/hutech/borg/focuser.htm

Shawn

This might help, just as an add-on to what he's got (some rotate, others
don't e.g. #7315):

Thanks for the suggestion. We just got a #7315 focuser and #7316 adapter on
Astromart.

Dennis