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Strange Marks on Image

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#1 hungerford

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Posted 19 January 2019 - 09:04 AM

Hi,

I have been using my Moravian G2-8300 mono for a couple of years now and never experience this issue before.

There is some dark line and some lighter lines all over the image. 

I took this image last nigh in HA with a lot of moon light. The exposures were 10 minutes for 12 frames.

I cannot think what could create this problem.

Thanks for looking

Vince

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#2 james7ca

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Posted 19 January 2019 - 09:27 AM

Almost looks like drips of water. Maybe some condensations on the camera chamber window.



#3 Der_Pit

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Posted 19 January 2019 - 09:56 AM

I agree, looks like something that follows the changing direction of gravity (while tracking).  That some of the streaks have bright rims supports the idea of water droplets...



#4 buckeyestargazer

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Posted 19 January 2019 - 11:36 AM

Yeah, my guess too is some sort of condensation, although I've never seen anything quite like that.  When is the last time you recharged your desiccant?



#5 hungerford

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Posted 19 January 2019 - 01:36 PM

Thank you for your help. I have changed the desiccant 6 months ago but the camera stays fitted to the scope in the observatory and it has been very damp lately.

I will change the desiccant and see if that solve the problem. In the past when the desiccant needed changing the stars became blotted so this is why I didn't make the connection.

Vince 



#6 ciraxis

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Posted 19 January 2019 - 01:57 PM

I had this happen before and it was in fact a bit of condensation, it was on an extremely humid night.  



#7 james7ca

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Posted 19 January 2019 - 11:13 PM

As I said earlier, I suspect that it may have been on the outside of the camera chamber window. Does the camera have a heater for the window?




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