ASI 1600MMC strange lines in sub integration

merlino

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 ?

Support@ZWO

Could you give us a single original image? you can put it on dropbox, and give us a link.

Sam@ZWO

I think you need to calibrate with flat

merlino

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-OQmSYDK3eqsJnYo1NeIjpCWsPNeu

Thanks

Support@ZWO

Thank you, we are downloading the files now!

Support@ZWO

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.

erikgu

Hi,

Has there been any conclusion on this problem?

Erik

Support@ZWO

No response, but I think it can be calibrated.