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I have a feathertouch focuser on my TEC180. It is very good. No complaints really. Comparing it with Tak or AP focusers I would probably rate the 4 inch AP focuser as better as it is stronger and larger. But even then the AP one has a feathertouch microfocuser which is way better than the Tak add on one. But not as good as the new FSQ106 microfocuser.
TEC did some tests on its 3.5 inch custom feathertouch focuser. There is some minor flex at about 10lbs and the flex is less when the focuser is upside down. The AP focuser I doubt would flex if I put it under my car!
I use Robofocus on my focusers and I recommend them as very good pieces of equipment.
If it came to price I estimate a Moonlite + Robofocus would be far better than a feathertouch all by itself. The digital focuser is so much more precise and makes accurate focusing totally easy.
Perhaps a 2nd hand AP focuser with Robofocus if it would fit would be even better. AP probably can make an adapter quite cheaply if none exists.
Greg.
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