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How necessary is an IR reduction filter?

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  • How necessary is an IR reduction filter?

    I'm about to be shooting a project on the BMCC with a fair amount of daytime outdoor shooting. How necessary is it that I have an IR reduction filter? Can I get by without it or is it a must?

  • #2
    Are you using ND? Extreme ND? If so, then I would say the word "necessary" is in the eye of the beholder, but you will DEFINITELY have IR contamination.

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    • #3
      I will be using a good amount of ND. Will that reduce the IR contamination? I'm on a budget so I was considering this filter.
      http://www.bhphotovideo.com/c/produc..._5_65_Hot.html

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      • #4
        I don't know what else in the chain you're going to have, but a hot mirror on the front will definitely reduce IR. ND filters will just increase the IR/Visible Light ratio, so ND filtration alone actually makes IR contamination worse.

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        • #5
          So would it be best to invest in a set of IRND's? Or just use the hot mirror in conjunction with the ND's that I already own?
          Last edited by harrisoncj; 02-06-2014, 10:28 PM. Reason: Clarify the question

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          • #6
            hot mirror + what you have. I recommend the Schneider Tru Cut 680

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            • #7
              I have not personally found it to be an issue if you use 0.9 ND or below.

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              • #8
                http://www.bmcuser.com/showthread.ph...ll=1#post97497
                Blackmagic Design
                My BMD LUTs.

                **Any post by me prior to Aug 2014 was before i started working for Blackmagic**

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                • #9
                  When the Hoya IR Cut's back in stock, I'll be on to my second one.

                  It's basically my UV/Protector at this point, no matter where when what how I'm shooting, it never comes off of the lens.

                  SKYPE (best way to talk to me): Camera_Kholi | twitter
                  Avery and Pete: Superseeds Feature Film Trailer

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                  • #10
                    @Captain, for the Tiffen VND, did you have the Hoya IR Cut in front of the VND behind? My Tiffen VND is the 82mm with coarse threads at the front, so it is tough to put anything in front of the VND.

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                    • #11
                      Ive used a hot mirror before on the BMCC:

                      https://vimeo.com/67516262

                      Im using it ocassionally but have also invested in a tiffen irnd 77mm version. I should test out the difference between them in a better fashion.

                      Might pick up a hoya cut after going through the dedicated thread
                      Nick Vega
                      http://vimeo.com/nickvega

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