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Optolong Lextreme - Red vignette

Astrophotography Beginner Equipment
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#1 ChrisSnowdenAstro

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Posted 03 March 2021 - 05:18 PM

Hi .... can some one please help me with an issue im having... im using an optolong lextreme filter on my asi294mc pro camera and keep getting this horrible red border around most of my frames. Can anyone advise what this is and why its happening ... any advise would be helpful 

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  • 20210303_221813.jpg


#2 asanmax

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Posted 03 March 2021 - 05:50 PM

What scope?



#3 bobzeq25

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Posted 03 March 2021 - 06:14 PM

Are you taking flats and bias?  That usually cures vignetting.  And other things.



#4 sharkmelley

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Posted 03 March 2021 - 07:11 PM

The background "pattern" on the ASI294MC PRO when imaging narrowband is discussed quite a lot.

For example:

https://www.cloudyni...d-nb/?p=9374592
https://www.cloudyni...d-nb/?p=9458529

 

You should certainly try taking flats if you aren't already doing so.

 

Mark



#5 ChrisSnowdenAstro

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Posted 04 March 2021 - 09:17 AM

William optics z81



#6 ChrisSnowdenAstro

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Posted 04 March 2021 - 09:18 AM

William optics z81



#7 bobzeq25

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Posted 04 March 2021 - 10:41 AM

This isn't a telescope problem.  Are you taking flats and bias?



#8 ChrisSnowdenAstro

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Posted 04 March 2021 - 11:24 AM

Just to clear it up ... the image shown is a photo taken of my tablet screen by my phone so I could show the red border issue. I didn't take flats or bias on this occasion but will do from now on. 




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