Quote:
Originally Posted by BruceG
Charles, did you need to use any LP filter or sky glow filter with the Helix shot? I know I can get away with 3 and 4 minute subs before the sky glow becomes an issue but I guess I am a lot closer to the highway lights than the observatory site at Linden. I'm about 1o minutes drive west of there, but only around 400 metres from the highway and it's dreaded mercury vapour lights
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I did buy a CLS-CCD filter for using in the suburbs of Sydney. I have left it in the 1100D just to block the IR even when I am at linden. It's a full spectrum mod. All my Nebula shots have been with the CLS-CCD filter installed. The Galaxy and star shots with the 100D are without any filter.
The 100D can do 5 min subs with low noise. I have done some shot's with the 100D at 5 Mins and no Filter at linden. Linden Observatory is VERY dark though.
Charles