|
If you don't want to lug power around, you can use the chemical hand warmers sold at camping stores for only a dollar or two each.
These are little cloth pouches with a powder in them, you open the plastic packaging, munch the cloth pouch up for a bit to mix the chemicals and get the exothermic reaction started then place it over the lens. They work a little better if you can insulate the exposed parts(ie, not touching the lens body)
These work for an hour or so and kept me out of trouble in the early days before I got dew straps.
|