|
How do I fix frost/condensation on sensor window?
Before I spend yet more money on this hobby I wanted to see if anyone else has had this issue and could help with a relatively inexpensive solution.
Last night I went out to image the Rosette nebula. I cooled my ASI294 down to -15 and took a 5 min test shot. When I looked at it I noticed a red/blue mottling in the centre of the image (see attached images). When I took the camera off the scope I noticed that a very small amount of frost/condensation had formed on the outside of the sensor window. I carefully wiped it off but it returned.
So has anyone else encountered this? I see that ZWO sells a dew heater but am unsure if it will work. Will a dew strap help or will the heat it generates compete with the sensor cooling?
Any help appreciated as I'd like to get out again tonight.
Cheers,
Rene
|