I love my Orion 180mm Mak-Cass! Great for planets and Moon!
So most people love them but have issues with up to 3 hour cooling. You're in Chicago area. How do you cool it down and how do you handle going out at 30 degrees and it drops to 15 degrees in an hour or two? Does the scope adjust for very good seeing? Your input is appreciated.
Thats easy! If I know tonight will or suppose to be clear then I put my 180mm Mak-Cass outside in shade 3 to 4 hours before sunset. One thing I wouldnt do at 3 in morning unless If I want left my scope outside all night. I use my 4 inch refractor most of the time. 3-4 hours for my 180mm Mak-Cass, 2 hours for my 16 inch dobsonian and 1 hour for my 4 inch refractor. I live about 100 miles from Chicago now.
Drop 30 down to 15 degrees I wouldnt put my scope outside that long. My Garage is cold!