You've raised a fairly complicated issue. If it's only necessary to
remove the water, there are several ways to do it. If, however, the
water has infiltrated the lens and simply drying it out won't make it
functional (rust in the innards, e.g.), you have a much more serious
problem. I can suggest several ways to dry it out, but if it loses
function after that, I can't help. If it can be fixed by drying it,
the issue is one of reducing the vapor pressure of the water in the
ambient air below that of the vapor pressure of the water in the lens
at its temperature. Then the water in the lens will evaporate into
the ambient and the lens will dry out. 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, say, but
the correct temperature can be calculated, approximately) the ambient
and waiting a long time. Really, the lens manufacturer needs to be
consulted, it seems to me.
Roger
eichhorn@xxxxxx
On 2 Oct 2005, at 21:20, Terry wrote:
it was not salt water, it is an auto focus lens, but I still need
to dry it out and see what happens, any ideas, I know it can be
heated in the oven but I have no idea on exactly how to go about this.
Thanks
Terry L. Mair
Mair's Photography
158 South 580 East
Midway, Utah 84049
435-654-3607
www.mairsphotography.com
----- Original Message ----- From: "Emily L. Ferguson" <elf@xxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Sunday, October 02, 2005 7:08 PM
Subject: Re: warer in lens
At 6:45 PM -0600 10/2/05, Terry wrote:
can you believe I have been doing this professionally for over 20
years and this is the first time this has ever come up!
Count your blessings.
Hope it wasn't salt water. Hope it wasn't an autofocus lens.
--
Emily L. Ferguson
mailto:elf@xxxxxxxx 508-563-6822
New England landscapes, wooden boats and races, press photography
http://www.vsu.cape.com/~elf/
