Home Information Equipment DIY Projects Weather Links

2013: Messier 27; The Dumbbell Nebula in H-alpha
Image details
Date: June 10,  11, July 5, 6, and 7, 2013
Exposure: 9 hours 40 min (29x 20 min), ISO800, 12 Darks, 30 Flat darks, and 30 Flats

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 
Location: Emmen, The Netherlands

High resolution: (2,20 Mb)
DSLR-LLRGB post-processing luminance workflow  according to Scott Rosen's video tutorial:
 
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]
 -Star repair
 -Levels to set white point
 -GradientXterminator (med/low, and fine/medium)
 -Levels to set black point
 -Curves (anchored background and highlights)
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]
 -Levels correction for background blackpoint
 -High pass filtering on the details in M27 (8px overlay & 40px soft light; Don Goldman method)
 -Curves (anchored background and highlights)
 -Levels correction for background blackpoint
 -Carboni's v1.6 Deep Space Noise Reduction [Removes noise from background, not DSO]

All content on astrovirus.nl 2010-2013 by T. Schuurman