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INDI Library v1.9.6 Released (21 May 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

Hallos in raw images

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Hallos in raw images was created by Mohamed

Hello

The attached image is a staked raw capture for M_34. I noticed many hallos in the image. I think post-processing can take it out, but any idea what caused it?

 
Clear Skies!
Mohamed

Permanent
C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

Portable
WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
6 months 1 week ago #78660
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Replied by Alfred on topic Hallos in raw images

I'm not sure, are we talking bloated stars or these big "circles" around the center of the image?
Dew/ice on the lens comes to mind. If so, a dew heater can prevent that from happening. Another possibility is a less than perfect lens. If that's the issue, you could try a UV/IR filter to prevent bloated stars.
Are there any light sources close to the scope? Scattered light might enter the scope and make its way to the sensor.
Last edit: 6 months 1 week ago by Alfred.
6 months 1 week ago #78666

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Replied by Mohamed on topic Re:Hallos in raw images


Hi Daniel

I’m talking about halos all over the picture… stars expected to be big at f/10. Temperature can drop at night below 0C but I have the dew heater on. Do you maximize the dew heater level at winter?

PS this is my 1st time to capture in this weather
Clear Skies!
Mohamed

Permanent
C9.25 f/10, HEQ5, MyFocuserPro2, OAG, ASI174MC guide, ASI533MC Pro

Portable
WO Z61, iOptron SmartEQ Pro+, MyFocuserPro2, OAG, ASI120MM guide, ASI183MM Pro, EFW
6 months 1 week ago #78667

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