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Old 02-09-2017, 04:19 PM
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deadsimple
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Solar (02/09/17)

First light with my new ASI174mm, and first ever attempt at a full disc. Quite a capable little camera.
  • LS60THa/PT/BT1200
  • Stack: best 10/1000 @ ~179fps (with ROI cropping)
  • Gain: 250
  • Exposure: 0.170ms
  • Software: Firecapture + Autostakkert!2 + AstraImage
  • AstraImage post-processing (in order):
    • Histogram stretch
    • Remove focus blur: kernel_size=1.16, HQ method, VH sharp
    • Wavelet sharpen: Very small=6, Small=3
    • Multiscale Sharpen: small amount of Very Small Details
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Old 02-09-2017, 05:54 PM
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h0ughy (David)
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done well - LOL dead simple to do Eh? get yourself a vixen 2.4 Barlow lens from Steve Massey then start to chase the seeing and then stack and blend to make a FD
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Old 03-09-2017, 10:29 PM
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Great capture, nice detail in the AR.
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Old 04-09-2017, 07:36 PM
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Wow, what a terrible image I posted! I've attached another attempt at processing.

Best 10% of 20k images this time (over 2 minutes), which allows a more aggressive "very small detail" wavelet sharpening. Some extra features around the sunspots and in between can now be resolved.

Quote:
Originally Posted by h0ughy View Post
done well - LOL dead simple to do Eh? get yourself a vixen 2.4 Barlow lens from Steve Massey then start to chase the seeing and then stack and blend to make a FD
Thanks for the feedback. I'm looking at a couple of options: throwing in a barlow as suggested (I've got a 3x TV and 2x GSO), or looking at another sensor (e.g. ASI178mm) that can achieve a full disc at ~1"/pixel without mosaicing - but at 1/3 of the framerate.

I guess what matters is .. how quickly do features on the surface change? Should I be limiting my lucky imaging session to 30 seconds, or 5 minutes? I guess I'll find out when I get more sunny weekends.
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