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2013: Van den Bergh 142; The Elephant's Trunk in Cepheus in HaRGB
Image details
Date:  August 25,  26, and 27, 2013
Exposure: Ha: 7 hours (21x 20 min), ISO800, 12 Darks, 30 Flats, and 30 Flat darks;
RGB: 6 hours 30 min (39x 10 min) ISO800, 18 darks, 60 flats, 20 bias

Telescope: 8" Skywatcher Newton
@F/5 with MPCC and Baader 7 nm Ha-filter 
Mount: NEQ6-pro, controled by EQmod/CdC, guided by  QHY5/9x50 Finder Guider/PHD
Camera: Peltier-cooled Canon 350Da (TEC@10C)
Location: Emmen, The Netherlands

High resolution: (2,51 Mb)
DSLR-LLRGB post-processing workflow  according to Scott Rosen's video tutorial, and Starizona's Ha(HaR)GB method:

Ha-data

Original 32-bit floating point RGB image in Photoshop CS3:
 -In Chanels fill green and blue chanels with black
 
-Convert RGB image to 16-bits greyscale
 -Convert back to RGB [RGB reconvertion is only done for easy of interpretation of PS histgram and tools]
 -Digital Development Processing in Nebulosity 2.5
 -Star repair
 -Levels to set black point
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]
 -Curves (anchored background and highlights)
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]
 -High pass filtering on the details in VdB142 (8px overlay & 40px soft light; Don Goldman method)
 -GradientXterminator (med/low, and fine/medium)

RGB data:
Original 32-bit floating point RGB image in Photoshop CS3:
 -Convert image to 16-bits
 -Color Balance in Nebulosity 2.5
 -Digital Development Processing in Nebulosity 2.5
 -GradientXterminator (med/low, and fine/medium)
 -Levels to set black point
 -Make duplicte image for Luminance processing

Convert Luminance image to grey scale and back to RGB
 -Curves (anchored background and highlights)
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]
 -GradientXterminator (med/low, and fine/medium)
 -Screen Mask Invert to bring out faint detail

Continue processing RGB image
 -Color balance using Levels
 -GradientXterminator (med/low, and fine/medium)
 -Curves (anchored background and highlights)
 -Levels to set black point
 -Carboni's v1.6 Space Noise Reduction
 -Selective color, Reds (-100% Cyan), Yellow (-100% Cyan), Blue (+100% Cyan, -100% Yelllow)
 -Carboni's v1.6  Increase Star Color
 -GradientXterminator (fine/medium)
 -Match Color +50 Color Intesity
 -Hasta La Vista Green medium
 -Insert luminance at 100% opacity

HaRGB combine in Photoshop CS3:
 -Align in PS CS3
 -Extract R-channel from RGB image and paste on top of Ha image, normal blending, 30% opacity, HaR30
 -Paste HaR back to R-channel in RGB image to form (HaR30)GB image
 -Selective color, Reds (-100% Cyan), Yellow (-100% Cyan), Blue (+100% Cyan, -100% Yelllow)
 -Insert HaR in luminosity blend at 40% opacity
 -Selective color, Reds (-100% Cyan), Yellow (-100% Cyan), Blue (+100% Cyan, -100% Yelllow)
 -Levels to set black point
 -Saturation -10
 -Hasta La Vista Green medium
 -GradientXterminator (fine/medium)


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