ASI 1600MMC strange lines in sub integration

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Merlino
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Joined: Tue Nov 21, 2017 1:58 am

ASI 1600MMC strange lines in sub integration

Post by Merlino » Sun Apr 08, 2018 4:16 pm

Hi,
i have a C8HD edge with 0,7x Celestron reducer and ASI 1600MMC with ZWO OAG and ZWO 7x36 filter wheel.
With RGB filters i have these strange lines on my integration
I did not add any other filter (like UHC, Idas or similar)
Anyone had same problem ?
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Sean.Wang
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Re: ASI 1600MMC strange lines in sub integration

Post by Sean.Wang » Mon Apr 09, 2018 10:15 am

Could you give us a single original image? you can put it on dropbox, and give us a link.
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Sam
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Re: ASI 1600MMC strange lines in sub integration

Post by Sam » Tue Apr 10, 2018 12:30 am

I think you need to calibrate with flat
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Merlino
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Re: ASI 1600MMC strange lines in sub integration

Post by Merlino » Wed Apr 11, 2018 12:21 pm

Hi and thanks to answering me, i post a google drive link with single L R G B and flat
Same problem, is it possible a reflection inside the protection glass of sensor ?

https://drive.google.com/open?id=1Vn1-O ... IjpCWsPNeu

Thanks

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Sean.Wang
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Re: ASI 1600MMC strange lines in sub integration

Post by Sean.Wang » Thu Apr 12, 2018 6:58 am

Thank you, we are downloading the files now!
ZWO | Marketing Consultant
Location:lon=120.6 lat=31.3
SuZhou China

motto:
Don't face one's fate, can't be a real man;
Don't know manners, can't be gentle;
Don't know meaning behind the words, can't understand man's heart.

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Sean.Wang
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Re: ASI 1600MMC strange lines in sub integration

Post by Sean.Wang » Thu Apr 12, 2018 8:12 am

We checked the files, and found two thing might be incorrect.
1. Flat frames brightness is too low, usually we recommend the brightness median value at 25000ADU-30000ADU. but your flat only have 13000ADU.
2. Flat frame can't calibrate the light frame. I did test use Master_B_flat to calibrate a single B light frame, B / master falt B. But looks the flat can't calibrate perfectly.
3. Master flat need to calibrate each single light frame at frist, then stack all calibrated light frames.

I recommend take new flat frames, redo the calibration.
ZWO | Marketing Consultant
Location:lon=120.6 lat=31.3
SuZhou China

motto:
Don't face one's fate, can't be a real man;
Don't know manners, can't be gentle;
Don't know meaning behind the words, can't understand man's heart.

erikgu
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Joined: Fri Jan 04, 2019 3:08 pm

Re: ASI 1600MMC strange lines in sub integration

Post by erikgu » Fri Mar 29, 2019 6:48 am

Hi,

Has there been any conclusion on this problem?

Erik

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Sean.Wang
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Re: ASI 1600MMC strange lines in sub integration

Post by Sean.Wang » Tue Apr 16, 2019 9:28 am

No response, but I think it can be calibrated.
ZWO | Marketing Consultant
Location:lon=120.6 lat=31.3
SuZhou China

motto:
Don't face one's fate, can't be a real man;
Don't know manners, can't be gentle;
Don't know meaning behind the words, can't understand man's heart.

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