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Question: when you say you have mag 3 skies, what scale are you using? I may not understand the scales too well. I read up on the Bortle scale and determined that my skies are about 5-1/2. I thought they said that the lower numbers referred to darker skies and the higher numbers referred to more polluted skies. Do I have it backwards?

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For limiting magnitude, the scale is backwards. Low numbers are more light polluted and big numbers are better.

For Bortle small numbers are better. With a class One sky being as good as it gets and 9 being inner city whiteout. Most guys around here will specifically say Bortle if using it, otherwise assume limiting magnitude.

Just have to get used to the jargon around here...

Andrew

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Andrew Cooper

Personal Website and CN Gallery
Handmade 18" Dob / NS11GPS / 6" RFT / 90mm APO / TV-76 ...and a twin 10m
"I have loved the stars too fondly to be fearful of the night." --Sarah Williams

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