|
I use a RoboFocus on a JMI NGF-C on my 12" LX200. Works flawlessly. I bought it about 2 years ago. I have vague memories that the RoboFocus uses stepper vs JMI using Servo, resulting in the RoboFocus having exact repeatability where as the JMI not. Correct me if I'm wrong. Think my RoboFocus cost me about $400 from Bintel? not 100% sure now. The RoboFocus has all the bells and wistles of temperature comphensation, buttons you can pre-program to specific positions, ASCOM compliant (so works with FocusMax which I now consider critical considering the usefulness of the free FocusMax software), etc.
For the cheap end of the scale, I use an Orion Accufocus on my Megrez, $89 form Bintel and does a great job. No computer interface and limited speed range on the slow end of the scale but perfectly functional and useful, no problem. I think you could adapt it to any scope with the right mounting bracket etc made.
|