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    Tips on masking projectors?

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    • JJHP3
      JJHP3 last edited by

      Hi - I have never used masks on my projectors before this upcoming installation. The projectors I'm using have enough spill that I need to try and trim it down. I had a roll of Cinefoil lying about and have been trying that. I tape the foil directly over the projector lens.It works, but makes a very soft edge. Any experiences you might have to share about getting rid of the inherent (at least in LCD) projector spill?


      Thanks! - John

      MBP'21- M1-Max; Sonoma 14.7; Isadora: 4.0.7 (ARM) ---- artwork: terragizmo.net

      CitizenJoe 1 Reply Last reply Reply Quote 0
      • CitizenJoe
        CitizenJoe @JJHP3 last edited by

        @jjhp3

        The further away the mask is, the harder the line will be. 

        If I have to do that, I invent some sort of a rig to move the mask away from the lens. A foot or 1.5' will work better.

        Cheers,

        Hugh

        Hugh in Winnipeg - All test machines, Win10/11 Pro, 64 bit, OS SSD and separate data SSD.
        Dell 7560, i9 11950H, 64 gigs, NVIDIA RTX A4000 w/8 GB GDDR6

        Woland 1 Reply Last reply Reply Quote 2
        • Woland
          Woland Tech Staff @CitizenJoe last edited by

          @citizenjoe said:

          I invent some sort of a rig to move the mask away from the lens. A foot or 1.5' will work better.

           If the projector is hanging from a grid or a batten that's part of a fly system, you could attach the mask to a sidearm to get it out in front of the beamer.

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          • JJHP3
            JJHP3 last edited by

            Wonderful advice gentlemen. Not sure in this case how to implement the distance, but I'll give it a try! Much appreciated.

            MBP'21- M1-Max; Sonoma 14.7; Isadora: 4.0.7 (ARM) ---- artwork: terragizmo.net

            Woland 1 Reply Last reply Reply Quote 0
            • Woland
              Woland Tech Staff @JJHP3 last edited by Woland

              @jjhp3 said:

              Not sure in this case how to implement the distance

              You could also MacGyver something with black spray-painted cardboard, blackwrap, duvetyn, tieline, zipties, coathangers, gaff tape, etc. For the distance, you could use coathangers, small diameter PVC pipe, short pieces of 1"x3", etc.

              TroikaTronix Technical Support
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              JJHP3 1 Reply Last reply Reply Quote 1
              • JJHP3
                JJHP3 @Woland last edited by

                @woland

                Ah gosh - you're making me feel lazy! I'll look into it and thanks for the encouragement.  - John

                MBP'21- M1-Max; Sonoma 14.7; Isadora: 4.0.7 (ARM) ---- artwork: terragizmo.net

                jhoepffner 1 Reply Last reply Reply Quote 0
                • jhoepffner
                  jhoepffner @JJHP3 last edited by

                  @jjhp3

                  The problem, If you distance the side-arm from the lens is that you have a big reflexion of video grey on the black flag, visble by audience. When I need to mask a beamer, as for sub-titles, I use a side-arm and a cage made of cinefoil to block the diffusion from the black surface.

                  Jacques Hoepffner http://hoepffner.info
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