Quote:
Originally Posted by Tony_
I'm not sure about using solvents on the sensor? Does it have a filter in front of it. Sometimes the solvents don't dry evenly and can cause smearing, which can be hard to remove. Maybe someone else can give better advice on cleaning the sensor. If you scratch the sensor or cover filter (if there is one) you will get a permanent line in all your images.
If there is dust on the sensor you should be able to see it with a magnifying glass if you do it under a light.
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Hi Tony, fair enough, I understand.
Quote:
Originally Posted by Tony_
Occasionally I get an small insect in the camera that leaves spots when it lands on the sensor - but they are usually the same shape and not as many. Check your subs - see if the spots are in the same place on every exposure.
I think it is unusual to have so many dust spots - how old is the camera and how is it stored?
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Yes, that's what I thought also, and they just appeared after I put a new off-axis guider in place, weren't there before.
The camera has been stored in a bag with an air-tight zip-lock. I keep it with the desiccant that came with it (plugs into the power point to dry out again). It's about two years old with me, but I bought it second hand.
I'll try some more subs after I swept it clean and see if there's a difference.