Edwin:
You can do this in a complicated way, or a somewhat crude but workable way.
First, if you are working with HD video — 16:9 aspect ratio — you want a
Super-16 camera so you have as much of the film devoted to the image as
possible — unless of course you want to make 16mm prints, then regular 16 is
what you want. S16 makes sense if you are just archiving this for the future,
when it will get scanned back to digital.
Use a good HD monitor, 1920 x 1080, preferably an IPS LCD unless you can get an
OLED monitor. Use a slow stock — an EI 50 Daylight-balanced color stock is a
good choice. A 2560 x 1440 monitor is better, as it will reduce the size of
pixels on film (scale the HD image to fit the monitor, a 1.5x enlargement).
You can build a setup that encloses the area between the screen and the lens to
keep external light and reflections out. Shoot exposure tests, and calibrate
the monitor so you get the full range of exposure from the digital image — the
object is not for it to look good on the monitor, but to not lose anything
going to film.
I assume you are using a motor on the Bolex. In order to cheaply sync the
camera and computer (there are expensive ways that are better but probably cost
more than you want to spend) you need a Bolex that has a 1:1 frame shaft — this
would be, if I recall correctly, a Rex 4 or later. You need to make something
that fits into the 1:1 shaft that can trigger a switch, either magnetic
proximity or optical. (Magnetic is probably easier. Mount a magnet on a disk
attached to the shaft, and let it trigger a $1 magnetic switch, once per frame.)
Your exposure with the slower stock, with an f/stop of around f/4, will be
limited to somewhere under 6 fps, maybe 2-4 fps. This lets you get away with
using the magnetic switch to trigger the computer to advance frame by frame.
If you are using software that uses the right arrow key to advance a single
frame, you can either destroy a keyboard and wire the magnetic switch in place
of that key, or get a $35 USB keyboard interface like this:
http://www.ultimarc.com/ipacve.html
If you can find a Bolex animation motor you can use that instead, and trigger
the motor and computer together. There are so many options for motors that I
won’t go into them.
If you want to get clever you can use a stepper motor and a motor controller
for the camera but that gets trickier.
Use a good prime lens, a 26mm Macro Switar is a good choice.
Note that you want to trigger the computer to advance the frame before the
camera shutter opens — you may have to adjust the magnet position to adjust the
phase so it triggers.
It works better than it should. I've built a few 35mm 4K recorders like this,
though with different motors, and a Mitchell camera and 4K LCD monitor, and
special software to make the system self-calibrating.
Good luck!
Jeff Kreines
Kinetta
On Dec 24, 2013, at 10:19 PM, edwin . kotakhi...@gmail.com wrote:
Hi Roger,
We don't have Oxberry animation camera.
What i can do is, to mount the Bolex on handmade stand, something that can
work like Oxberry stand.
But do you know how to connect the motor with the computer screen. Is that
possible to run the bolex automaticly, sync with the computer files, frame by
frame?
best,
Edwin.
On Tue, Dec 24, 2013 at 7:00 PM, frameworks-requ...@jonasmekasfilms.com
wrote:
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Today's Topics:
1. Re: DPX files transfer to 16mm negative, for image archiving
purpose. (Roger Wilson)
2. Re: DPX files transfer to 16mm negative, for image archiving
purpose. (christopher nigel)
-- Forwarded message --
From: Roger Wilson rogerdwil...@sympatico.ca
To: Experimental Film Discussion List frameworks@jonasmekasfilms.com
Cc:
Date: Mon, 23 Dec 2013 15:10:48 +
Subject: Re: [Frameworks] DPX files transfer to 16mm negative, for image
archiving purpose.
Do you have access to an Oxberry animation camera that shoots 16mm? This may
be easier to work with then a bolex/tripod set up. I have never done this
myself but know a couple filmmakers who have taken this route and have been
very happy with the final results.
Roger D. Wilson
Film Scientist
613 324 - 7504
rogerdwil...@sympatico.ca
http://www.rogerdwilson.ca
Without failure you can never achieve success. I have based my process and my
career as an experimental film artist on this statement; and I welcome it
