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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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Comments

Art Adams: | March, 05, 2009

Test

Michael B. McGee: | March, 14, 2009

where does one find a Schneider Tru-Cut 680?  i’ve looked everywhere.

thanks.

Art Adams: | March, 14, 2009

I don’t know that they are commercially available. I got one to test when Schneider first brought IR filters on the market but I think the only one they’ve officially released is the Tru-Cut 750, which works great on the RED.

You should give them a call. They’re about the nicest people you’d ever hope to do business with.

Michael B. McGee: | March, 14, 2009

Thanks Art.  yeah,i’ve gotta EX1.  i second that about Scheider.  I see many of their reps through the year.  very nice people.  i’ll call them monday.

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