I made my own heaters and control box, all in 12volts. I have one for my corrector(18 watts), under the dew shield, one for my eyepiece(5 watts) and one on each end of my finder(combined about 3.5 watts). Its not a battle to clear the dew, but it is good sense to turn them on if you know the dew point is going to be low. Im still observing with no dramas while everyone else is screaming about leaving the hair dryer at home!!
