Quote:
Originally Posted by TheDecepticon
Hi guys. I too have experienced some of these problems, and as I was following the threads I decided to experiment also. If I dont have a filter down near the chip, it freezes over straight away! I can then open up the camera and put a filter there and the freezing is gone, with out trying to dry the inside of the camera with warm air or what ever. How do you guys stop this from happening? I have tried storing it in a plastic bag with dessicant or with the heater and it still happens.
The only shot I have done that didn't give me a reflection was a Horse's Head shot with the Megrz110 and a Flat II(which I just can't seem to get the spacing right still!) with which I used the original noise piece with no glass>an Astronomik UV/IR>a version of Marc's adjustable spacer(thanks for the diagram)>Flat II>extension>IDAS LPS P2 filter on the end in that order.
I then ended up with blocky stars- is that what is called undersampling?
I would like to find an answer, as I'm getting ticked off and am considering selling the QHY8, or perhaps we need some collective pressure on QHY to help resolve the problem.
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TBH, i dont think its a fault as such, just REALLY bad luck in the way it all functions, when stuck together, and i dont think QHY are responsible.
I think Marc hit the nail on the head, its probably an internal reflection with light bouncing off the shiny, clean sensor front, onto the secondary, and casting reflections of the primary collimation marker through the MPCC
i think the only fix would be an anti reflection filter or coating.
its pretty poor though
