A few times I set up the scopes after dinner so they can cool down.Then there is a trip to the shops or pick up a kid while Im in a cold sweat driving constantly looking at the clouds/rain.
Twice I have driven home at quite illegal speeds to rescue the scopes from rain.Melbourne rain one day, raining the next.
However I have had a couple of dreams about when my 6" refractor dropped onto the concrete and smashed the lens.
