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No I don't have a heater or a dew shield. Are they essentially an extension of the main tube that sticks out a little way, like my ED80 has? I could probably make one easily enough if you reckon it's worth it...? Is there a particular ideal length for a 200mm?
My initial thought last night was dew; my red dot finder was littlerally dripping within half an hour, but in my (very limited) experience dew makes it just plain not work. It wasn't great, but I could still see stuff. Perhaps when conditions are right - or wrong! - it's possible to get a view that's worse but not entirely ruined..?
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