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Ed Magowan | all galleries >> Astrophotography >> Nebulae > m57_1_filtered.jpg
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m57_1_filtered.jpg

This is my first attempt at prime focus with the Canon Digital Rebel. Although it was a clear evening, light pollution reduces the transparency from my back yard to between 4 and 4.5 within 30 degrees of zenith. Seeing was quite good, the distorted stars are due mostly to tracking error. The camera/scope combination yields an EFL of 3200mm and I'm guiding with a 700mm fl/60mm refractor and 12.5mm eyepiece on an antique spur-gear-driven C8; definitely have to try a focal reducer. This two minute exposure was taken at ISO400 and processed in PhotoShop with dark frame subtraction, levels and mild USM sharpening; and noise reduction in NeatImage.


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kenn 18-Jul-2004 06:08
paradise under the dashboard