Search the Community
Showing results for tags 'crt'.
Hi, I'm shooting an old CRT TV, playing a video from a VCR. I'll be using the Sony Venice. I did a test with a Sony mirrorless and couldn't get rid of the rolling bars no matter what shutter I tried. I'm assuming it will have the same result with the Venice. I know sync boxes are used for film cameras. Do they work for digital cameras as well? Or is there another solution. Thanks for the help. Ben
It's my understanding that to eliminate roll bar from a CRT or 'Tube' TV, one can use the combination of a 23.967 framerate and a 144º shutter. This specific combination, of course, only works with NTSC (60Hz) televisions only. The other PAL (60Hz) methods obviously don't pertain to my situation. Anyway, It just so happens I will be filming a CRT TV, however I own an Arriflex SRII which has a fixed 180 degree shutter. I am able to use a speed controller to set the framerate to 23.976 but that alone won't exactly fix the problem, but rather keep the black bar in a fixed location. I want to eliminate the black bar entirely. It occurred to me that this wasn't a possibility, until I researched the problem quite a bit and actually found out there is actually something called a Film/Video Synchronizing Control Box. At my first uneducated glance I thought it was some outdated equipment which was probably used to change the framerate of cameras before we had framerate controllers. Then the size of the thing struck me and I thought "Maybe this isn't simply for only framerate" because there's no conceivable way to describe going from a giant box to change the framerate to only years later the speed controllers we all know and love that can all fit in the palm of your hand. That's just not the way technology progresses. So after more research, and finding a couple instances of people vaguely talking about how they used to use these sync boxes 'back in the day', I seemingly submitted to the fact that this thing can actually do what it says. But I still just couldn't understand how people can make the claim that this thing could sync any camera with a CRT TV when not every camera has an adjustable shutter. That was until I found this post on here from back in March of 2018. This actually makes sense, given how cathode ray tubes are sensitive to magnetic fields. Now before anyone dismisses the Film/Video Synchronizing Control Box, I should probably point out a few ways I will not settle for fixing the problem. 1. No I do not want to green screen the tv, even with artificial light to suggest television glow. It never looks real. 2. I don't want anything shot digitally, especially since the cost of a digital camera is more than that of the sync box. 3. I can't afford renting another film camera that has an adjustable shutter for merely one or two shots. I have considered number one as an option in the past for shots of the television screen only, however one also runs into the problem of the glass reflection not being there. And probably the biggest problem is my idea of a wide shot of the actor watching the television from across the room, both the television and the talent visible in the frame. Now while real television glow is nowhere near enough for a key light, it would have still been present in the frame thus casting some type of glow that would reflect near objects, even the slightest bit. I went a little off track as I often do, so here are my two questions. How does the Film/Video Synchronizing Control Box actually work? Can someone who has used this before please explain the setup and operation in detail? If applicable to my situation I'd love to own one.