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Cheers RobF.
The battery box I've bought has a built-in voltage indicator.
I've already had problems with my 14mm Samyang fogging up. Wouldn't suit a dew heater but I was thinking about a low powered 12v hair dryer type of gizmo.
Will try it out on an old lens in case it fogs up on the inside, not something I want with my good lens
Last edited by DarkKnight; 20-07-2015 at 09:48 PM.
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