Focuser - Electric or Feathertouch
Posted 06 March 2013 - 06:46 AM
I like the JMI as I wouldn't have to touch the scope at all, but I like how I can super fine tune the focus with the Feathertouch.
Any input would be very appreciated and helpful.
Posted 06 March 2013 - 07:26 AM
The JMI focuser is overpriced in my opinion. However, if you're adept at mechanical things then take a look at an Orion electric focuser which is intended for refractors. A different bracket might make it work nicely on your scope.
Also, take a look at Jameco and MPJA.com. Both companies have numerous low voltage DC gear motors for a reasonable price.
Posted 06 March 2013 - 07:39 AM
Posted 06 March 2013 - 07:43 AM
As for fine focusing, I have the Celestron motofocuser (now discontinued) which has variable speed control, so I can focus as fine as I wish to. I assume the JMI has speed control too.
Posted 06 March 2013 - 08:02 AM
If you use a variable speed motor as the focuser then look for a controller that acts like a bi-directional variable speed device with a center zero position. If you use a DIY servo then get a cheap servo tester. This type of servo has a very sensitive neutral position so you'll need to cut power immediately on reaching focus.
Posted 06 March 2013 - 08:26 AM
Posted 06 March 2013 - 11:00 AM
Posted 06 March 2013 - 12:49 PM
I've had the JMI motofocus and it gave me 0 vibrations so it was very nice, but I think I paid $179 for it. Ouch...
Have a feathertouch on my lunt and a moonlite on my dob. I personally think the feathertouch is better between the 2
Posted 06 March 2013 - 04:16 PM
I'd go with the feathertouch. If you decide you need hands off focusing, Starlight offers a digital motorized controller. Its not cheap but it does work with the feathertouch.
Posted 07 March 2013 - 01:33 PM
If you use a PC in your setup, I recommend their USB-n-focus adapter, which will allow you to focus from your PC....great when its very cold out!
I have used the Moonlite focuser with great success. The owner Ron Newman answers the phone. They have no resellers, so no middleman markup. They design, machine, anodize, sell and most importantly support their setups. I give them an A+++++
I hope this helps!
Posted 20 March 2013 - 06:24 PM
Posted 20 March 2013 - 08:17 PM
The batinov might be an alternative but I always use my dewcap and its less easy to use in his configuration.
If you get the Farpoint mask you can just rest it on your dew shield. Be sure to get the type that have the adjustable rubber grommets which are not available for the C11.
Posted 21 March 2013 - 12:19 PM
Posted 01 April 2013 - 09:31 PM
Posted 20 May 2013 - 06:13 PM