Re: Lens condensation question

"Skip M" <shadowcatcher@xxxxxxx> wrote:
>
>Nope, didn't say that. It just works in reverse, going from hot and dry to
>cold and wet. Happened to me on Saturday, going from cool, damp outside to
>the relatively warmer and drier interior of a venue.

It never works in reverse. It is *always* the cooling of air to a
temperature below the dew point. The dew point changes, of course,
depending on the temperature and the relative humidity.

>But what I was referring to was in SoCal, if it is truly hot, it is probably
>a Santa Ana, which can produce relative humidity in the singe digits, and if
>it is damp, it is winter, and relatively cold.

In fact it can happen at *any* temperature and relative humidity
combination. The point in every case is that if the air touching
the camera is rapidly dropped to a temperature below the dew point,
it *will* result in condensation.

Air with single digit relative humidity is not immune, it just
has a lower dew point.

--
Floyd L. Davidson http://www.apaflo.com/floyd_davidson
Ukpeagvik (Barrow, Alaska) floyd@xxxxxxxxxx
.

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