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Thanks Jeff, Mike and Greg,
I certainly try to take about a ratio of 1/3rd darks to
lights, always.
Some nights it's almost non-existent, some nights bleeding
obvious.
I did read somewhere that just putting the big (plastic) dust cover
over the end of the OTA wasn't good enough because IR light
goes through plastic to a certain degree, and alfoil over the
CCD camera was best.
Not sure how much leakage would contribute that way, but maybe it's
worth a try.
Also, my dome isn't exactly pitch black darkness either....I have LEDs,
power supply neons...monitor LEDs...all taped over with black tape,
but there is probably a measurable leakage through the BACK end of the
OTA of this feeble light.
What I shouldn't be offering as my example is last night's shot...after all
the moon was coming up in half an hour more, the dome was still cooling,
the OTA was still cooling...too many variables, hardly a scientific approach.
thanks for your help guys,
Steve B.
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