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[OM] Re: olympus-digest V2 #365

Subject: [OM] Re: olympus-digest V2 #365
From: "Greg Palman" <gpalman@xxxxxxxxxxxxxxxxx>
Date: Thu, 9 Jul 1998 20:11:34 -0400

> BTW, anybody got any solutions to fogged lenses when shooting sunrises?  If
> your equipment is cold (as it would be if you started shooting while still
> dark) it will fog up and moisture will condense as the morning air warms.

Ken,
Have you ever heard of the Kendrick dew remover? It's a 12v box and 
plug in leads that end in a wrap that is essentially a series of 
resistors that produce heat to dissipate dew. It is controlable from 
the box via a variable control. It is rated at very low amp in the 
low setting, which is all you need for most situations. It was 
developed for the amateur astronomy crowd to solve dew problems with 
telescopes but works great for cameras too. The actual heaters come 
in different lengths for differing diameters. It is a quality product 
not cheap but not excessive. It is designed to allow you to keep your 
glass just above ambient air temp to prevent fogging. I use one and 
couldn't operate in the nightime air without it. The dew cap 
mentioned does help but remember that a camera lens has little mass 
vs. a large refractor lens or reflector mirror. It will still cool to 
below ambient air temperature very fast. The purpose of these caps is 
as much to reduce stray light from entering the optical tube, the 
same as in camera lens use.  Visit his website at : 
http://kendrick-studio.com

--greg

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