Quote:
Originally Posted by gregbradley
Yes that does look good. I'll see if I can find some reviews about it. Its been out for a while and I haven't heard much about it.
There was also some smart autoguider Anacortes announced recently as well. The LVI I think it was called.
Perhaps 2 autoguiders could be good to achieve the differential guiding approach to eliminate flexure without an off axis guider.
Greg.
Thanks for that. How do you like yours? Is it dependent on the computer to keep running if the connection is interrupted? (ie does it have an internal buffer).
One advantage of the Starfish is it is powered by the USB cable and no second power cable (unless you use the cooled version).
Greg.
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Greg, the SG4 has the SBIG differential guider function already built in (with SBIG cams), and bluetooth compatibility!.
Its dawned on me that whether you guide through a guide scope or via long FL OAG makes all the diff. For regular external 2 sec guide as per Mike etc, the cams mentioned here would all do, but for OAG and AO its a different story altogether. Then cooling, darks, binning all become very important.
In my experience, the QHY5 with an ED80 was fine, and Im sure others mentioned are even better, but for long FL OAG/AO, the QHY5 didnt cut it, and I wouldnt expect it to. I bin3 with cooling and darks now, as Jase says, otherwise noise and false auto selection/calibration on hot pixels made it impossible.
In short, external guide with a guide scope is much less critical (with different results ofcourse, depending on FL).