Quote:
Originally Posted by toc
- Generally I can do unguided exposures of about 1 minute - not perfectly round, but roundish. This is at about 1000mm FL.
- Have not touched the factory defaults for guiding.
- Horsehead is not bad for tracking, but the longest I have done the Horse head and M42 is about 3 minutes guided. I start to get some missed subs anytime longer than that. DEC seems ok for these targets, but RA is quite a lot worse.
- Does not appear to be a setting for 'wedge altitude' in PHD2, or any location to specify the declination of the target. I think it just relies on you doing another calibration 
- PHD2 does have an Aggressiveness setting - I am using the defaults mostly here - I have played around a bit with it, but didnt see an improvement. I guess the issue is that the backlash is bad enough that PHD2 is sending a correction, and the mount is not moving. I could try to ramp that up I guess.
I think you have the same scope as me - a Skywatcher 190MN. How are you balancing the scope? do you bias it one way or the other, or leave it perfectly balanced?
Thanks for the help! If I get a chance tonight, I will forgo any imaging, and just fiddle. |
Yes i have an MN190, and i am actually in the middle of imaging NGC3324 (Gabriel Mistral Neb). Waiting for the moon to get out of the way so i can shoot Oiii. I balance it east heavy on RA, and rear heavy on DEC - just a little bit. It does not need as much heaviness as the old EQ6. I get nice flat guide plots for eastern targets. I am shooting 5 min narrowband subs. My PA is sitting on 9 arc secs off the SCP.
Dave (Syscore) on CN has just finished testing his CGX, worth a read in his new thread. He is very happy and has put up some 60" unguided subs as examples.