Re: [APML] Dew prevention on camera lens

[Nicola Montecchiari <nmontec@libero.it>]

Allan & Julie Whetzel ha detto: in data 07/07/2005 7.39:

> Hello-
>
> I'll be in the high Sierra Nevada in early August and wanted to do  
> some star trail photography while camping. I'll probably go 2-3 hours  
> with some exposures. I have a 28mm Zuiko f3.5 lens & hood on my  
> trusty OM1. I'd like to avoid dew on the lens - so I  was  
> contemplating the purchase of a Kendrick standard controller and as  
> described on their website a "2 inch heater for 2 inch eyepieces,  
> 50mm finders, some camera lenses."
>
> The 28mm Zuiko lens is 2" in diameter so it seems to me this would be  
> the setup I'd want to get. If so - will it keep dew off the camera  
> lens for long exposures? Would I just wrap the heater around the lens  
> as close as possible to where the hood starts?
>
> Any advice from the experienced would be appreciated!
>
> Thanks,
>
> Allan
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Hi Allan,

to remove and/or prevent dew, I simply use a hair-dryer, those one used 
in camping that work at 12V so that you can plug them into your 
favourite power supply or car battery. What I do is giving 10/20 seconds 
of hot air blowing in front of the lens every 5 minutes or so. It is not 
too annoying and it worked well for me. Moreover, those hairdryers are 
inexpensive.

Regards,
Nicola
http://astrofoto.laza.it
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