Sharpless 2-157 in Cassiopeia
(RA 23h 16m, DEC +60d 05m)
Photo Details:
- Instrument: AstroPhysics 130EDT Refractor (130mm-f/8) with integrated Field Flattener and Off Axis Guider
- Filters: Red - OG-590, Green & Blue - Custom designed with two types of Schott glass each
- Exposure: Red - 180 mins, Green - 180 mins, Blue - 180 mins
- Film: Kodak Tech Pan 2415
- Developer: D19, 10 minutes
- Location: Chews Ridge, California, El. 5000ft (121d 34' 03" W & 36d 18' 35" N) and Hidden Hill Observatory, California, El. 2500ft (121d 28' 59" W & 37d 24' 05" N)
- Date: September 1998
- Digital Processing Employed: Basic Levels and Curves to stretch contrast and balance color plus image gamma was raised to enhance viewing on average monitors. The enhanced image used Star and Noise XTerminator, star reduction and additional processing in Photoshop.
- Comments: This photo was assembled based on tests run by photographing a Kodak Gray Scale card in tricolor.
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