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2011: Messier 101; The Pinwheel Galaxy
Image details
Date: May 1, 2011
Exposure: 4 hours 15 min (53x 5 min), ISO800, 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: (1,67 Mb)
DSLR-LLRGB post-processing workflow  according to Scott Rosen's video tutorial:
 
Original RGB image in Nebulosity 2.5:
 -Color balance [CB]
 -DDP using standard settings [DDP]

Original CB/DDP RGB image in Photoshop CS3:
 -Carboni's v1.6 Vertical Banding Noise Reduction
 -Levels [Black-, Grey-, and White points]
 -Gradient Exterminator
 -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 entire image
 -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 using layer mask, 1x
 -Highpass Filtering on the galaxy based on Don Goldman workflow
 -Shrink Stars using a minimum filter
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO], removes some of the sharpening in the weak part of the spiral arm
 
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)
 -Increase saturation in Lab mode [Blues]
 -Luminance addition on 100% 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]
Old version

Image details
Date: May 1, 2011
Exposure: 4 hours 15 min (53x 5 min), ISO800, 24 Darks, 20 Bias, and 20 Flats

Telescope: 8" Skywatcher Newton
@F/5 with MPCC 
Mount: NEQ6-pr2, controled by EQmod/CdC, guided by  QHY5/9x50 Finder Guider/PHD
Camera: Peltier-cooled Canon 350Da 
Location: Emmen, The Netherlands

High resolution: (1,82 Mb)

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