FLI focuser or feathertouch motor for autofocus?
Posted 25 March 2013 - 03:27 PM
Which way would you go? My NP127is has the feathertouch focuser. I can add the feathertouch motor and go.. Or is the FLI focuser the way to go for repeatability and remote operation? I take it the FLI's are absolute focusers while the feathertouch is not?
Let me know. Thanks.
Posted 25 March 2013 - 07:08 PM
It worked very well with great focusing.I used a FLI ML8300, filter wheel, reduce/flattener and adapters for about 6.5-7 lbs load.
The FLI focuser is more accurate, but it has less movement of course as far a total movement. It is a great focuser expecially if you have a heavy load. But the cost is very high in comparison.
Posted 25 March 2013 - 10:27 PM
Any other opinions are welcomed.
Posted 26 March 2013 - 08:38 AM
Posted 26 March 2013 - 02:03 PM
A google search brought your post up. Thanks for that info.
I have noticed repeatability to be an issue. If I go from an L to an Ha, and back and forth and back and forth, focus will change. That micron focus change, over time, becomes a larger error.. Like PE!
Hopefully my indicator will be here soon and I can get back to the drawing board of getting my backlash setup correctly. Eyeballing the focus change is a PETA..
Posted 26 March 2013 - 03:50 PM
Backlash makes all the difference. I have extended the test to 100 iterations later on and every time it was dead on.