M15 globular cluster in Pegasus

Date: 12/5/2007

Location: Tierra Del Sol, California

Conditions: 0% moon, seeing 4/10, transparency 6/10, temperature 55-65 F, very dry night, wind 5-20 mpg.

Telescope: Canon 70-200mm L series lens, piggy backed on side by side.

Guiding: TV85, 600mm, F7, prime focus, no diagonal, camera The Images Source 24AF04.AS, PHD software

Mount: Losmandy G11, Gemini goto, polar scope used to polar align.

Camera: Canon EOS 40D

Focusing: Manual on star Mirfak using LIVE FOCUS viewing done on laptop using Canon Utility software.

Exposures: lights: (4) 2 min raw 800 ISO, (2) 3 min raw 800 ISO, (6) darks raw, (6) bias raw, (6) flats raw.

Processing: IP 3.0 - converted raw to FITS, dark flat, & bias frame calibrated, centroid 2 pt align-rotate, combined min-max excluded average, digital development, convert to 16 bit TIFF, PS CS , white balance, neutralize sky, black balance, color enhance, image-adjustment-highlights , crop, unsharp mask, and converted to 8 bit JPEG for web.

Comments: magnitude 6.3, size 18'