EX1/EX3 IR Filter Shoot-Out
The EX1/EX3 built-in Hot Mirrors suck. Or do they? One way to find out...
By Art Adams | February 26, 2009
FIRST UP: SCHNEIDER OPTICS
The first filter I tried was the Schneider Tru-Cut 680. This filter has consistently worked on every camera I've tried it on:
It works perfectly, but unfortunately the dichroic coating on this filter is fairly heavy and causes vignetting at short focal lengths. Here's the same filter on the EX1 at the short end of the zoom:
The cyan vignette is the result of looking through the dichroic coating at too sharp an angle. The Tru-Cut 680 is an excellent all-around IR/far red cut filter except for this one failing.
The Schneider ND 1.2/Tru-Cut 720 combo removes about half the red contamination on both cameras:
And the Schneider Tru-Cut 750 had no effect at all:
I was still stuck on my initial hunch that the EX1 and EX3 had either very poor or very absent built-in Hot Mirrors, but something about this test was feeling familiar. Still, I stuck to my assumptions as I tested the rest of the filter families on the next pages...
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freshdv - Sun, May 19 2013 - 5:24 pm
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freshdv - Sun, May 19 2013 - 5:21 pm
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