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Projecting Super Eight on wall
Hey everybody,
I am projecting old Super-Eight, Eight, and Sixteen reels onto a wall and video-taping… it works
fairly well…The projector is a GAF 1388. The video cam is a Canon Vixia HV30.
The projection surface is a bright white sheet of 13 X 19 heavyweight matte print paper.
I have adjusted and tweaked all surfaces and normals to eliminate “perspective”.
The phenomenon I am getting is that the super-sensitive Canon is registering the flutter of the three-bladed GAF shutter wheel and creating a “fan-like” visual effect of dark-light fluttering. You can’t really see it on the pure projected movie on the wall, but the super-sensitive Canon registers this flutter and totally exaggerates it so that it’s pretty distracting.
Anyone have a work-around on this effect?
Many thanks!!
Richard
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6 Replies
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This is the FCP forum – perhaps you’d get better results in “Cinematography” or “Indie Film”.
I’d try to manipulate the shutter on the video camera to get rid of those blades.
I guess thats the added cost of a pro telecine – having a camera running in synch with the projector…
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Okay, thanks! I didn’t realize CC had those other forums…
Rich
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If your camera has settings to sync when shooting from a computer monitor they might also work with this issue.
DWR
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If the Vixia has variable shutter speeds, you should try to experiment with them. You’re dealing with a phase problem – your 3-bladed shutter produces 54 fps and 72 fps when running at 18 or 24 fps respectively, and I assume the camera is running at 29.97. Different shutter speeds can help mininimize the effect. The other way is to use a variable speed projector and manually ride the speed control to keep it as close to 20 fps as possible.
Good luck!
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Thank you Lars,
I cannot find out much about this old (1970s) GAF 8/Super 8 projector. Not adjustable.
I assume it’s playing 24 fps then.The Canon Vixia has choices of 30 and 60 (and maybe 50?)
So, I see… if the two systems can somehow be made a “multiple” of each other they could
theoretically be in phase 24/72 or 24/48… I’ll try to find out more.My old 16 projector, a nice Singer Graflex, is much more sophisticated and may have a speed control.
Thank you!!
Richard
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[Richard Chenoweth] “I cannot find out much about this old (1970s) GAF 8/Super 8 projector. Not adjustable.
I assume it’s playing 24 fps then.”Don’t make that assumption. Its much more likely to be running at 18fps. That was the de-facto standard for Super 8mm. Only higher-end gear could do 24 fps, and there’s usually a speed selector on those models (both projectors and cameras). As far as I know there are no super 8 cameras that shoot 24 fps only; every camera I’ve ever seen (and I’ve seen a few) is either 18 fps only or 18/24 switchable. Some have other speeds as well, like 9 fps and 32 or 54 fps for slomo’s; but 18 fps is the common speed.
Go to Onsuper8.org and scroll down to the bottom right. There you’ll find a bunch of diy telecine links.
A common approach is to fix the projector’s frame rate to 20fps (giving you 60fps with a 3-bladed shutter, perfect for ntsc) by phase-locking it to the 60hz household AC current.
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