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6 - 12 min. subs @ ISO400. TEC-140 with the AP 27TVPH .75x reducer, f/5.4 (760mm), Nikon D50
(modified), Baader uv/ir filter. 3 darks, 6 bias frames, 6 flats. Noise reduction in Neat Image.
Temperature approx. 40 deg. F.
20080306_Hercules-Cluster-CombAdpAdd_Neat-adjcrop.jpg
All images copyright William J. Shaheen, unless otherwise noted. Do not use or distribute without prior consent.