Horsehead M20
The Trifid Nebula

(Click on image for Full Resolution)

(Click here for last my 2001 version with my Vixen 102mm Flourite and ST-237a)

Date: August 19, 2003
Exposure: HaRRGB : 6 x 1200 Ha, 3 x 300s R,G, 8 x 300s B
Processing: Captured with CCDSoftV5, MaxIm for Image calibration,(16 HA,R,G,B flats dark subtracted and Sigma Reject combined, 40 bias frames Sigma Reject combined, 20-1800s darks Sigma Reject combined), dead/hot pixel removal, alignment, normalization. Photoshop for final HaR, HARGB combine, levels and curves adjust and conversion to jpg for website.
Conditions: Good, skies were clear and transparency was better than usual.
Scope: AP155EDF, f/7 (1.671 arcsec/pix measured with TheSky), Vixen 102mm Flourite @ f/9 for Guiding. All equipment on a Paramount ME and can be seen here.
Camera: SBIG ST-8XE, -20°, SBIG ST-237A for Guiding
Comments: Added the H-Alpha for the luminance layer to try and get the extra detail it contains. Still working on gradients produced by the light pollution that continues to get worse.