1 - 15 min. exposure with the SBIG ST-8300M (monochrome) CCD camera at -20C. Baader 2" UV/IR filter. Telescope configuration: TEC-140 (980mm, f/7) and no focal reducer, yielding an image scale of 1.14 arc-seconds/pixel; Astro-Tech 2" field flattener. Mount: Losmandy G11 w/Gemini. Focused using a Bahtinov focus mask. Post processing: bad pixel removal in Nebulosity2 using a 20 dark frame BPM (threshold 5240); calibrated using a 16 bias frame master in ImagesPlus 3.82. DDP and curves applied in Nebulosity 2. Adaptive Richardson-Lucy deconvolution applied in ImagesPlus 3.82. Image cropped from original of 3352 x 2532 to 1600 x 1200.

20100511_M16_001-ddpcrvcrparl.tif