|
Are you handy with a soldering iron and have some 1W resistors?
If so, I soldered up some in series (1 watt) and then heat shrink the lot and fit it inside my lense hood. 2 wires out and hook up to 12VDC. As the resistors are 1W rated, I stick to about 50% of their rating (ie 0.5W maximum) and I normally stick to about 4W or less total. I've done this on a 16-35mm lense and I did not have a fogging problem all night and could set and forget the camera for an all night star trail. Just attached it to a 7AH gell battery and you get an easy 10hrs out of it without destroying the battery.
Cheers,
Darrin...
|