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Bizarre filters


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#1 Edgar Dubrovskiy

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Posted 06 May 2011 - 12:47 PM

Hi!

Was shoting a simple music video for a competition last week and director showed me some very bizarre filters he found in a storage room at his work. They measured 4' x 3.5' and came in various deep colours like yellow, blue, purple etc. but the key was - the reflections in these filters appeared to have all sorts of colours from blue to green on the yellow filter, magenta on the red etc...

Here is a sample picture taken with the yellow filter at 45 degrees:
Posted Image

If anyone can help to figure out what are these filters, would be amazing :)
Thanks a lot!
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#2 Stuart Brereton

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Posted 06 May 2011 - 01:35 PM

Looks similar to a Vari Color Polarizer, but it's hard to know for sure.
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#3 Daniel Klockenkemper

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Posted 09 May 2011 - 12:10 AM

Perhaps they were dichroic filters?
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#4 Jonathan Bowerbank

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Posted 09 May 2011 - 05:52 AM

I dunno, to me it looks kinda like a Hot Mirror, covering half the lens and swung away from the lens to reflect the male figure who's standing to the side of the camera, creating a trippy double exposure type effect. Which is why he appears soft with the evidence of a slight double reflection coming from the outer and inner panes of the filter itself.

I have a Red/Green polarizer that I've used to shoot stills with...and I long for the day where I'll be able to use in on a shoot:

http://www.flickr.co...157614573399785
http://www.flickr.co...157614573399785
http://www.flickr.co...157614573399785
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#5 Jonathan Bowerbank

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Posted 09 May 2011 - 04:38 PM

Oh, didn't realize you'd captioned the photo, saying it was a yellow filter at 45 degree angle...at least I sorta guessed right ;)

It appears to have a dichroic effect, you may be on to something.
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#6 Eric Salinger

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Posted 13 May 2011 - 02:01 AM

Oh, didn't realize you'd captioned the photo, saying it was a yellow filter at 45 degree angle...at least I sorta guessed right ;)

It appears to have a dichroic effect, you may be on to something.



Forgive my ignorance, but how do you put a filter on a 45 degree angle? Is this done in a matte box? I could imagine doing it for a horizontal split in a special tray, but for the vertical split like Edgar posted originally, I'm at a loss for how one would do that.
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#7 Edgar Dubrovskiy

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Posted 15 May 2011 - 05:36 PM

Perhaps they were dichroic filters?


Thanks a lot Daniel, definitely "these guys"!
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#8 Edgar Dubrovskiy

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Posted 15 May 2011 - 05:43 PM

Forgive my ignorance, but how do you put a filter on a 45 degree angle? Is this done in a matte box? I could imagine doing it for a horizontal split in a special tray, but for the vertical split like Edgar posted originally, I'm at a loss for how one would do that.


Hi Eric, in this particular instance it was a hand-rig. Left one :)
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#9 Eric Salinger

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Posted 16 May 2011 - 12:04 AM

Hi Eric, in this particular instance it was a hand-rig. Left one :)


Ha, that was the mental solution I had in mind for that, but I wondered if perhaps there was a Matte Box stage I was unfamiliar with that achieved it.

So I'm guessing an operator, 1st AC pulling focus, and a 2nd holding the filter? Hope you guys weren't handheld and walking around much!
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#10 Edgar Dubrovskiy

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Posted 16 May 2011 - 04:42 PM

Nah, in this instance it was just tests :)
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#11 Jonathan Bowerbank

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Posted 05 June 2011 - 09:29 PM

Forgive my ignorance, but how do you put a filter on a 45 degree angle? Is this done in a matte box? I could imagine doing it for a horizontal split in a special tray, but for the vertical split like Edgar posted originally, I'm at a loss for how one would do that.


Jerry rig ;)

Or perhaps afixing a swing-away mattebox at an angle, then cutting/killing/masking off half of the reflected image with some black tape (not ON the filter, but along the mattebox), revealing the subject in front of the lens :)
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