M45 - Pleiades:
Sept 11-12, 2007; Albireo West Observatory, CO.
This is one of my first digital pics.
300 mm Sigma f4.0 Apo lens at f4.8 (Nikon mount), Losmandy GM-8 mount, SBIG-STV & efinder guiding, Canon-Hutech 400D.
ISO 400 (should have used 800)
68 x 40 sec subs = 45 min; 9 darks, no flats. Five minute subs would have been more appropriate.
Cropped, but full resolution, 3.9 arcsec/pixel.
For a conventional camera lens, this Sigma 300 mm Apo works pretty well. I.e Highly useable, with slight coma around edges of frame. But not as sharp as a true astrograph, e.g. Tak 85 mm Baby Q.