Boris,
My climate is regularly -10 degrees C in the winter.
I have not experienced problems taking the camera out for shots and
then putting it away again in a bag.
As Cotty says, the real problem comes when returning a cold camera
(-10 deg C) to a warm interior.
(As in, I've left the camera/lens in a cold, parked car for 2-3 hours
in -10 deg C temperatures.)
The cold air has no capacity to hold water, but the warm air has water
suspended in it.
The cold camera and lens will precipitate the water out of the air and
onto the camera - internal parts if not careful.
Put the cold camera/lenses into an airtight plastic bag before
entering the warm environment.
After 30 to 60 minutes, the camera will reach room temperature and can
be removed.
(To speed the process, you can use your body heat to get it warm.)
Regards,  Bob S.


On Nov 15, 2007 4:27 PM, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote:
> Keep camera and lenses in a shoulder bag. It will act as a thermal
> buffer. Keep them in the bag unless you're using them. When you go
> indoors, let the bag sit a few minutes before opening it,
> particularly if it is humid indoors or if outside temperatures are
> sub-zero or it was very wet.
>
> Unless you go outdoors and have the camera and lenses out for long
> enough to completely and thoroughly cold-soak in sub-freezing
> temperatures, you should have no problems. This is exactly what I did
> on my trip around the US last year, with days and nights of
> temperatures in the bitter 0-15 F range. A few minutes exposure to
> very cold temperatures will not make any difference at all.
>
> Godfrey
>
>
>
> On Nov 15, 2007, at 10:23 AM, Boris Liberman wrote:
>
> > Hi there.
> >
> > It turns out that I have my tickets for Prague next weekend. I am
> > going
> > to take my K10D, DA 21 and FA 43 lenses. The main issue that still
> > remains to be resolved is that of taking the lenses and the camera
> > back
> > and forth between indoors (warm?!) and outdoors (cold?!). I've no
> > experience with this kind of shooting whatsoever.
> >
> > Any hints of practical nature or rules to be observed would be most
> > appreciated.
> >
> > Thanks.
> >
> > Boris
> >
>
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