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Re: [OM] fungus

Subject: Re: [OM] fungus
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
Date: Sun, 27 Mar 2011 02:56:17 +1300
Marc wrote
 
> Just taken from a 6-8C fridge, it would never be warmer than ambient air
> here. :)
> 
> Cheers,
> Marc
> Noosa Heads, Oz
> 
> On Friday, 25 March 2011, Ken Norton <ken@xxxxxxxxxxx> wrote:
> > Brian, there would be no condensation if the camera is warmer than
> > ambient air.
Yes, I was aware that ambient temperatures in coastal Queensland 
never/rarely drop below 10 deg C.

There is another good reason, I believe, for using cold storage such as this 
with (eg) silica gel, rather than a small heater, and it is this:  higher 
temperatures are likely to vaporise off the more volatile fractions of the 
greases and oils used in lenses and cameras, thus leading sooner to a need 
for a re-lube as the lubricants become degraded and stiffer, making focusing 
and other movements more difficult. Cooler storage temperatures will get 
around this real issue.

Now, as ( as I understand it) the specialised lubricants are difficult for 
camera technicians to obtain, so the need to fend off the evil hour is greater.

Brian Swale. 
-- 
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