Quick test with new Schneider Optics Platinum IR 1/2 stop filter on the PMW-EX1 - Page 2 at DVinfo.net

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Sony XDCAM EX Pro Handhelds
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Old May 3rd, 2010, 02:17 PM   #16
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Quote:
Originally Posted by Charles Newcomb View Post
Also, can it be piggybacked with a thin UV filter w/o vignetting?
Charles,

You could use a thin UV filter but I wonder why you would. The only reason might be protection of the filter or if you were shooting at very high altitude but otherwise the extra air-to-glass surface that the UV provides would be more of a downside and than positive.

The vignetting issue on 486 filters does not come from the UV filtration but rather the IR filtration where you have 30+ layers of coatings that show in the image at wide angles. The Platinum Series IRND and Platinum Series 1/2 Stop are absorbtive and therefore do not have any vignetting issues.

Ryan Avery
Schneider Optics
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Old May 3rd, 2010, 02:58 PM   #17
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Hello, Ryan:

Thanks for your response.

I live at 8,000' elevation and I regularly shoot at elevations from 7,000' to 12,000'. UV is an issue up here.

Aside from that I keep the UV filter on as protection from scratches and such.

I was going to buy an ND filter that is also a UV filter (sometimes I need just a tad more ND than one can crank in on the camera) before you announced this new one.

EDIT: Never mind. I decided to get a matte box and use the 4x5.65 filter instead of the screw-in one. Thanks.

Last edited by Charles Newcomb; May 4th, 2010 at 09:14 AM.
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Old May 4th, 2010, 11:33 AM   #18
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Charles,

I got your edit but I thought I would add one little known note.

Schneider True-Pols and B+W Polarizers filter out all UV light below 410nm which is what a normal UV filter does and what everything except "aircraft grade" UVs (UV417, etc) filter out. So there is no need for additional UV filtration when using a Polarizer.

Polarizers also loose about 1.7 to 2.1 stops depending on the angle of incidence of light so that could be a useable solution short of ND and a UV.

Ryan Avery
Schneider Optics
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