got a light shroud for it? I think a dew shield is pretty essential aswel.just teething problems I think get to a dark site and let us know how you get on  the 300p I've had a brief look through was really impressive  (might think about a cooling fab aswel to speed the cooling up?) Sent from my GT-I9000 using Tapatalk 2 Skyliner 200p - now completely pimped out from top to bottom No more E/Ps , Colimators or books - the spending has come to a halt. Mike73 Posted 21 April 2012 - 08:55 AM Thanks for the comments. Forecasts are looking alright here till about midnight tonight so going to try again but this time I'II be better prepared and I'II be at a dark site. No light shroud yet but I'm going to pick up a camping mat up today so hopefully won't have the dew problems again. Not too worried about adding a cooling fan at the moment, I usually have the scope cooling a couple hours before I observe anyway. swamp thing Posted 21 April 2012 - 09:30 AM swamp thing "I'm the one infected, twisted animator" Moderators 5,034 posts Location: Sutton, S London, uk Hi Mike Sorry to hear you were underwhelmed by your new scope. Truss tube Dobs are particularly prone to local light pollution. Any light coming through the trusses really effects their performance. A shroud is pretty much essential kit on one if you wanna get the best out of it.