Quote:
Originally Posted by gregbradley
Looks like frost to me, perhaps dew. If its dew simply have a look and you'll see. If its frost you'll need to shine a bright torch at an angle on the sensor and you'll see it shining.
Greg.
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Thanks for the comment, Greg. I never thought about ice being the cause, let alone dew. It's the grid patterning that has puzzled me. The ASI071MC Pro has a built-in dew heater which defaults to 'on'. When I checked in Sky X Pro under camera settings, it was on (though the 'on' setting, counter-intuitively, is 0, not 1).
Some night soon, I might get to do some astrophotography, but not from my backyard which looks south and has no other quadrant of the sky).
Cheers,
Richard