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2011: NGC891; An Edge-on Galaxy in Andromeda
Image details
Date: September 30, and October 1, 2011
Exposure: 4 hours 40 min (28x10 min), ISO1600, 24 Darks, 20 Bias, and 20 Flats

Telescope: 8" Skywatcher Newton
@F/5 with MPCC 
Mount: NEQ6-pro, controled by EQmod/CdC, guided by  QHY5/9x50 Finder Guider/PHD
Camera: Peltier-cooled Canon 350Da 
Location: Emmen, The Netherlands

High resolution: (2,31 Mb)
DSLR-LLRGB post-processing workflow  according to Scott Rosen's video tutorial:
 
Original RGB image in Photoshop CS3:
 -GxT on 32 bit floating-point autosave DSS stack [Medium, Low]
 -Convert to 16 bits, GxT (selection magic wand tool minus galaxy) [High, Medium]

Original GxT-ed RGB image in Nebulosity 2.5:
 -DDP using standard settings [DDP]
 -Color balance [CB]


Original CB/DDP RGB image in Photoshop CS3:
 -Carboni's v1.6 Vertical Banding Noise Reduction
 -Levels [Black-, Grey-, and White points]
 -Convert to greyscale [This creates the Synthetic Luminance]
 -Convert back to RGB [RGB reconvertion is only done for easy of interpretation of PS histgram and tools]
 
Synthetic Luminance in Photoshop CS3:
 -Annie's Astro Action beta 1 Deconvolution, masked on NGC 891 and background galaxies
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]
 -Curves, selective on weak dustlanes, with anchored background and highlights, 2x normal curve, followed by a selective contrast curve
 -Shrink Stars using a minimum filter
 -Highpass Filtering on the galaxy based on Don Goldman workflow

RGB processing in Photoshop CS3:
 -Curves and Levels to bring RGB to a comparable level as the Luminance
 -HLVG, medium strength
 -Carboni's v1.6 Space Noise Reduction
 -Carboni's v1.6 Less Crunchy, More Fuzzy
 -Increase saturation using Adam Block's method [3 copies of RGB, 3rd copy Luminosty blend mode, 2nd copy soft light blend mode, flatten all 3 copies] Repeat to taste, 3x for this image. This results in a slightly over saturated image
 -Carboni's v1.6 Less Crunchy, More Fuzzy
 -Gaussian Blur (2px)
 -Luminance addition on 80% opacity, Luminosity blend mode [The general idea is to increase the saturation of the RGB stepwise, until the luminance can be added at 100% opacity]
-Increase saturation using Adam Block's method [3 copies of RGB, 3rd copy Luminosty blend mode, 2nd copy soft light blend mode, flatten all 3 copies] Repeat to taste, 1x for this image.
-Luminance addition on 100% opacity, Luminosity blend mode
Old version

Image details
Date: September 30, and October 1, 2011
Exposure: 4 hours 40 min (28x10 min), ISO1600, 24 Darks, 20 Bias, and 20 Flats

Telescope: 8" Skywatcher Newton
@F/5 with MPCC 
Mount: NEQ6-pro, controled by EQmod/CdC, guided by  QHY5/9x50 Finder Guider/PHD
Camera: Peltier-cooled Canon 350Da 
Location: Emmen, The Netherlands

High resolution: (2,26 Mb)

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