Archived posting to the Leica Users Group, 2001/02/25

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Lense testing...
From: "Bryan Caldwell" <bcaldwell@softcom.net>
Date: Sun, 25 Feb 2001 19:45:59 -0800
References: <NABBLIJOIFAICKBIEPJJEEODIGAA.austin@darkroom.com>

Austin,

My problem with a lot of this testing is that it only measures the effect of
one variable - in your case, the effect of your filter on your lens, using
your camera and your film, etc. I think what needs to be done, is that once
you have somehow determined a difference between filter and no filter, you
need to place that in the context of all the other variables present when a
photograph is taken.

For instance, a test of a tripod mounted camera might reveal a slight
degradation of resolution when a filter is used. But the loss of resolution
when the same camera is used hand-held might be so great from the reduced
stability that any benefit gained by removing the filter is lost.

My experience with "scientific testing" of photographic equipment is that
you will get results that hold true for your equipment, your subject matter,
and the conditions under which you tested. They won't necessarily apply to
others.

Between the photographer's eye and the finished image, there are too many
variables to isolate a single one and evaluate it all by itself.

Bryan

In reply to: Message from "Austin Franklin" <austin@darkroom.com> (RE: [Leica] Lense testing...)