I meant slightly above the temperature of the lens. And, yes, things
do dry out in a refrigerator, but the air in the refrigerator is
likely to be saturated with water vapor and evaporation will be slow
and essentially stop when the lens reaches the temperature of its
surroundings. If you try that, put it in a sealed plastic bag when
you remove it from the refrigerator until it reaches room
temperature. Otherwise, moisture from the air will condense on the
lens putting you back where you started. After it reaches room
temperature, put it back in the refrigerator and repeat the process.
It's hard to say how many times you would have to do this. I
wouldn't put it the freezer. The water would freeze expanding as it
does so. That might further damage the lens. An oven set at the
highest operating temperature the lens manufacturer recommends might
be the best bet. A discussion on the thermodynamics of the processes
involved would be lengthy and possibly confusing.
Roger
Roger Eichhorn
eichhorn@xxxxxx
On 3 Oct 2005, at 07:31, Gregory Fraser wrote:
This can be done either by
lowering the ambient pressure in an evacuated chamber, or by placing
it in an oven whose temperature is slightly above (+20 degF,
20 degrees Farenheit? My refrigerator is above 20 degrees Farenheit
will that do?
