Re: [Leica] UV or not UV

["Dan Post" <dwpost@email.msn.com>]

Peter has a most reasonable explanation, and it's hard to disagree, but I
would add one caveat- USE A LENSHADE! Anytime you add an air to glass
surface, hanging that far into the light, you are just begging for some
flare!
Dan

- -----Original Message-----
From: Kotsinadelis, Peter (Peter) <peterk@lucent.com>
To: 'leica-users@mejac.palo-alto.ca.us' <leica-users@mejac.palo-alto.ca.us>
Date: Friday, May 21, 1999 11:51 AM
Subject: RE: [Leica] UV or not UV


>Don,
>
>Water can destroy the coating on a lens if the lens is subjected to it for
>an extended period of time. Salt water will accelerate this, but only if
>left on the lens or over a period of time.
>If you were at the ocean and the lens were sprayed each day, I would say
>that in a few months you would see the coating start to change/dissolve.
>But if you clean the lens each day, preferably with an alcohol-type cleaner
>(Many lens manufacturers use an alcohol based cleaner for the lens
>elements.) the alcohol provides the added benefit of absorbing moisture as
>well. Hence, the possibility of coating damage is reduced.
>
>OTOH, if you were doing beach photography daily, IMO a UV or warming filter
>would provide a barrier to the salt water and also the sand.  I am sure
>others may tell you otherwise, but why take the chance?  A filter is cheap
>protection, and unless you blow up you prints to ungodly proportions you
>will not be able to see any difference.
>Those who may refuse to use filters in certain situations, such as daily
>beach photgraphy, are either well-off financially or so careful in taking
>care of their gear they miss the many photographic opportunities.  The
>reason I say this is pre-occupation with equipment care, or anything else
>for that matter, will lessen your attention to the reason you are really
>there, photography!
>
>Peter K
>
>
>
>-----Original Message-----
>From: DonjR43198@aol.com [mailto:DonjR43198@aol.com]
>Sent: Thursday, May 20, 1999 7:59 PM
>To: leica-users@mejac.palo-alto.ca.us
>Subject: Re: [Leica] UV or not UV
>
>
>Years ago, I was told by someone at Leica that salt water may attack the
>lens
>coating and it was a good idea to install the UV filter if there might be a
>chance of salt water drops or spray finding its way to the lens.