Archived posting to the Leica Users Group, 1998/12/08

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Subject: [Leica] Re: KINOPTIC lenses
From: Jim Brick <jimbrick@photoaccess.com>
Date: Tue, 08 Dec 1998 16:54:59 -0800

Could be... But I suspect that it's the front element coating more than
anything. That is, BTW, the first line of defence against flare. And since
the flare occurred with bright objects or stray light hitting the front
element, I'm convinced that it is a coating problem.

Jim


At 07:33 PM 12/8/98 -0500, you wrote:
>
>
>leica-users@mejac.palo-alto.ca.us wrote:
>
>
>
>There is more to flare than just the coating. Internal light baffles,
>non-reflective interior surfaces, etc. also play a significant role.
>Furthermore, an objective designed with deeply curved elements will
>exhibit more flare than one designed with shallower curves.  
>
>I assume it is the optical design itself, not neccessarily the coating,
>that is responsible for a major part of the flare.
>
>Regards,
>Akhil Lal
>alal@bcc.cuny.edu
> 
>
>
>			-SNIP-
>> BUT their lens coating was a real dog. High contrast subjects, any stray
>> light (just a reflection off of a tree leaf) would cause a visible level of
>> flare.
>