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An Extreme Lucky Imaging Test on M13
I tried out an intense lucky image session to push the core sharpness of M13.
SQA55 telescope
Star Adventurer GTI mount with guiding
ASI533mc camera
Astronomik l-3 UV/IR cut filter
A two minute exposure using the best 40% of 1600 .2s exposures, edited in siril/pixinsight/blurx+noisex/graxpert:
stack at 3.0 drizzle/.3333 droplet in Siril
Split R G B, re-register color channels and recombine
Crop to target
SPCC with exact curves for the ASI533 and Astronomic l-3
Graxpert BGE pass
BlurX at .2 stars 0 nebula
Arcsinh stretch for stars
NoiseX at .7
Reset black level
SCNR, boost saturation curve
Rerun BlurX at .05 stars 0 nebula
Final black level + curves
I've tested it already with my normal full 2minute exposures and got a much larger field but less definition in the core. The lucky version seems to pull out a central sphere of bluer stars. I'm hoping to test a middle ground of 5s exposures next and see whether it's the best of both worlds for detail , or if the core is still better in true lucky imaging and could be masked into the new image.
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I tried out an intense lucky image session to push the core sharpness of M13.
SQA55 telescope
Star Adventurer GTI mount with guiding
ASI533mc camera
Astronomik l-3 UV/IR cut filter
A two minute exposure using the best 40% of 1600 .2s exposures, edited in siril/pixinsight/blurx+noisex/graxpert:
stack at 3.0 drizzle/.3333 droplet in Siril
Split R G B, re-register color channels and recombine
Crop to target
SPCC with exact curves for the ASI533 and Astronomic l-3
Graxpert BGE pass
BlurX at .2 stars 0 nebula
Arcsinh stretch for stars
NoiseX at .7
Reset black level
SCNR, boost saturation curve
Rerun BlurX at .05 stars 0 nebula
Final black level + curves
I've tested it already with my normal full 2minute exposures and got a much larger field but less definition in the core. The lucky version seems to pull out a central sphere of bluer stars. I'm hoping to test a middle ground of 5s exposures next and see whether it's the best of both worlds for detail , or if the core is still better in true lucky imaging and could be masked into the new image.
#space
source
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