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Re: [OM] True, or just BS?

Subject: Re: [OM] True, or just BS?
From: Moose <olymoose@xxxxxxxxxxxxx>
Date: Sat, 05 Jul 2003 19:59:05 -0700
Generally, I'd be more interested in the optical performance of coatings than their resistance to improper handling. I mean, it's not like they just evaporate from the surfaces of one brand and not another. One has to actually mechanically and/or chemically attack them to remove the coatings, so this should only be of interest to someone who is rather rough on their lenses. "Wearing out" a coating implies poor care.

Another speculation: how much difference does it make to performance if the coating is removed from the front surface of the front element of a typical prime lens with 10-14 coated surfaces, or a zoom with 14-28 coated surfaces? It seems that it would at most lead to a rather small reduction in light transmission. Unlike an interior element, where reflections could bounce around inside and cause trouble, the reflections from the front of the FE just bounce harmlessly out away from the lens.

Moose

Albert wrote:

There's a guy at my local photo club; a walking encyclopedia of knowledge when it comes to lenses; because he's owned practically every single one before. One of the arguements we got into is coating. He says Sigma's and Tokina's have coatings that are prone to going bye bye within 3 years. As I've never owned my lenses for that long (and my UV in front keeps me from wiping my front element) I was wondering if this can be verified by the list or not..

He said that sigma, tokina, canon, generally have coatings that are more prone to being worn out. Said Leica coatings lasts the longest..

True, or BS? Or just how well you maintain the lens?




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