Hi,
This is a simple stack of 10 minutes Ha subs.
FRA600 / Ha 3nm / 533 mm pro
Any reason for this diffraction spikes?
These spikes are also visible in single sub.
Attached Thumbnails
Edited by Asher 61 Cygni, 26 March 2023 - 11:39 AM.
3 replies to this topic
#1
Asher 61 Cygni
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Posted 26 March 2023 - 11:36 AM
- ziggeman likes this
#2
Midnight Dan
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Posted 26 March 2023 - 11:44 AM
Are you using an OAG? Sometimes the prism can cause something like this.
Otherwise, it has to be something in the path of the optics. A wire? A nearby branch, clothesline, telephone wires?
-Dan
#3
dswtan
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Posted 26 March 2023 - 11:47 AM
Obstruction. Cool recipe to diagnose in this picture on Wikipedia:
https://en.wikipedia...ffraction_spike
https://en.wikipedia...ffraction_spike
#4
Asher 61 Cygni
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Posted 26 March 2023 - 02:40 PM
Thank you for the link.
Seems to be a dirty optics issue.
I don't think the front lens is the root cause. I will do some subs on Luminance filter too. May be its is Ha filter only.
Obstruction. Cool recipe to diagnose in this picture on Wikipedia:
https://en.wikipedia...ffraction_spike
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