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Also have a look at Sequence Generator Pro - the focuser routine uses multiple stars where you are pointing. It does not need to slew elsewhere, so no upset to guiding or realigning the field. I have a moonlite stepper and focusing takes about a minute for broadband and a couple for NB and, at f4, refocus is needed 10-20 times a night, depending on temperature. SGP will drive any ASCOM focuser and, with sequencing, plate solving, focusing and smart recovery, can pretty much automate your system.
Hardware wise, SharpSky is nice for adding to an existing focuser - includes temperature tracking refocus and dew heater control.
Last edited by Shiraz; 10-08-2015 at 10:48 AM.
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