I am at a loss, same setup 3 nights in a row, first 2 nights excellent, third night images are way over exposed at same settings. I am posting the Ha images, Oiii and Sii the same. The entire 3 hour session all the same. 300 sec images, 100 gain, -10c Equipment: Zwo 2600MM Zwo 7 position filter wheel Antila filters. Askar 600 scope.   |
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High thin clouds will do that
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That's cloud… very thin, probably couldn't see it with your eyes, but that's cloud alright.
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It seems you have a bayer pattern in the second one, which is kinda odd.
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I've had this happen once with my 2600 and twice with my 268. Had to send them in for repair. As a matter of fact my 268 is at the repair center right now for this exact same issue.
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Hard to tell what overexposed is from stretched images. What to the histograms look like from these 2 images?
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andrea tasselli:
It seems you have a bayer pattern in the second one, which is kinda odd. Yes it does, I am afraid this was not a high cloud issue (there we're none). I guess I wait for a clear night to find out but I am afraid it is the camera.
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Dan Kearl:
andrea tasselli:
It seems you have a bayer pattern in the second one, which is kinda odd.
Yes it does, I am afraid this was not a high cloud issue (there we're none).
I guess I wait for a clear night to find out but I am afraid it is the camera. I have a pole master attached to the dec plate and take an image every 60 seconds so it's looking where my scope is. You'd be surprised at the high clouds that you cannot see are actually there. You can tell by obviously seeing the bright clouds that pass by but also by the varying intensity of the brightness from frame to frame. You may not see them, the weatherbug or whatever app will say there's none but it's very likely they are there. Could be dew, high humidity, fog, I doubt it's the camera. The bayer pattern could be from star alignment interpolation, if these are aligned images.
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One more possibility. If it was cold and humid and you did not turn on the camera dew heater the sensor could have frosted up. I'm a brand new 2600MM owner that just moved from the Arizona desert to ice cold central Washington. I just learned this lesson myself.
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Dan Kearl:
Yes it does, I am afraid this was not a high cloud issue (there we're none).
I guess I wait for a clear night to find out but I am afraid it is the camera. *Hopefully it can be fixed without resorting to sending the camera away. Mine died on me just there and then.
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