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3 results

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Astrophotography filters: How narrow is too narrow

Saturday, June 29, 2024 by Jim Thompson

For many years now I have been promoting the idea that for emission nebulae, whether you have light pollution (LP) or not, the narrower your filter’s pass bands are, the better. Time and again my test results have demonstrated this relationship to be true; that object contrast and signal-to-noise-ratio (SNR) increase as the pass band width decreases. Recently howe...

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Canada sky glow is less than in the United States

Thursday, June 27, 2024 by Richard Harris

Recent observations show that Canadians generally experience less sky glow than Americans. This difference is mainly due to varying population densities and urban development patterns between the two countries. With its vast wilderness and lower population density, Canada has fewer urban centers contributing to light pollution. Why Canadians have less Sky-Glow than A...

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Dobsonian astrophotography with Benjamin Law

Tuesday, June 25, 2024 by Freeman Lightner

Benjamin Law, a member of the Royal Astronomical Society of Canada - Toronto Centre, presented his trials and persistence in astrophotography using his 14" Dobsonian telescope. This detailed presentation, delivered at the Recreational Astronomy Night Program at the Ontario Science Centre, showcased his impressive work, particularly his captures of the International...

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