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Dew Issue?

Dew Heater Acquisition Deep Sky Artifacts
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Nick Grundy avatar
Nick Grundy avatar
Can you all recognize this in the frame? It's on most all frames with various filters. The amount of the issue varies a bit on the subs (60s red sub of crescent nebula)

I'm guessing dew, but I have the powerbox set for autodew. From what I could see my dewpoint was about 50 degrees fahrenheit and it never dropped below 54 last night. 

Maybe I just need a bigger dew heater? Or set it manually?

wsg avatar
wsg avatar
Yes
Scott Badger avatar
Scott Badger avatar
Dew on the sensor window, not the OTA?

Cheers,
Scott
Nick Grundy avatar
Nick Grundy avatar
Scott Badger:
Dew on the sensor window, not the OTA?


I was wondering about that as well. The only change that correlates is that I installed the ASG Photon Cage 2 nights ago (have seen this on both nights. 

Has anyone else seen this on the Photon Cage? It does leave a bit of around the sensor area that wasn't previously there.
wsg avatar
wsg avatar
I have seen dew like this mostly on the sensor window but occasionally on my reducer glass.  I have never seen this on the big glass.
Nick Grundy avatar
Nick Grundy avatar
i'll double check to enable the dew heater on the asi6200mm and see if that clears it. Thanks all!
Scott Badger avatar
Scott Badger avatar
I have issues with my 268m when I try to cool it to fast in some conditions, and too much in others. When it does fog, I have a hair dryer handy to clear it. Part of the issue, I think, is that the sensor cooler can work against the window heater and sometimes pushes the window temperature below dew point despite the heater. It would help if there was a temperature sensor on the window too, not just the sensor,  to help monitor/manage this.

Cheers,
Scott
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