I suffer a major double star dilemma. I find that whether atmosphere or telescope settling in this problem remains. If I leave my 10" F5 to settle on the grass for 30 minutes, I usually end up with moisture everywhere, If I start viewing straight away, deep sky is not a problem but close doubles look disappointingly like poor collimation. Last night a case in point. I stayed with Gemini for an hour and while the Eskimo nebula(NGC2392) was perfectly clear and the striking M35 oc showed crisp bows of stars, some reasonably close doubles such as Lambda Gemini. sep 9.7" and Delta Gemini sep. 5.8" were impossible in a 9mm eyepiece. After about half an hour and just as the tissues reached the findercope, I suddenly had a brilliant scope, Rigel was easy and the two mentioned above and more became a breeze. Seeing seemed the same but moisture started to cover everything. Main mirror and diagonal were ok. I have never used the fan built into the main mirror. Would this help? I have tried a sheet over the lot and have considered a temporary tarp arrangement. I do know I get more moisture than most in the area as I am near a river and pretty low down. Do I go down the track of heaters everywhere or have a just a bad hell hole in my backyard? All suggestions will be borne with fortitude
