paler31

some great advice here one thing is worrying me though and that is how much power they draw. I have a celestron power tank so should have no problem connecting a dew strap controller but how long can i expect to run it for before needing a recharge.

thanks for the info guys i will look into heated strips.

john

hi i was using my telescope last night to take some images of andromeda. I had set my computer to take 5min exposures at iso 800. looking back at the pictures they gradually got dimmer and dimmer. I noticed that the front of the scope was covered in dew and put the poor image quality down to this. My question is do dew sheilds actually work? will they just slow the formation of dew? what is the best one to get and from where? should i be using somekind of heated dew sheild? any help would be appreciated, i should have said that i have a celestron c6 sgt scope and mount.

John