Quote:
Originally Posted by jase
Not wanting to put you on the spot Fred, but define reasonable? The truth of the matter is if your PE is greater than your arcsec/pixel combination, it is then deemed unreasonable. Clearly, guiding as you indicate mitigates this, however I think you'll agree that the fewer guiding corrections the better (indicating excellent tracking / low PE).
Anything that can improve your mounts performance is a good thing given it is the critical piece of the puzzle in the imaging game.
Also don't use PEMPro with an ASCOM hub. Just direct with the Gemini driver.
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I didnt define reasonable on purpose Jase, cause thats a minefield in itself, depends what your after
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I agree, PEC is a wonderous thing, but what I meant by my experience was, at the time I found curves were inverted (I got on to the author about that, its a long story, I think its alright now) and each run was so different it simply couldnt make a decent usable PEC result (couldve been cause my mount was overloaded). Also, in the mean time, I just started imaging, and found guiding good enough to just not bother with PEC anymore. My PE was "reasonably" smooth and guiding easily handled it (with 2 sec guide exposures), so I left it at that.
Im back to using it now to great effect, but its a different rig.
PEC becomes much more important with much longer guide exposures. With the G11 I always used 2 secs, so it mattered less.