Re: [Frameworks] DSLR telecine on a JK printer

From: John Woods (email suppressed)
Date: Fri Dec 10 2010 - 22:16:37 PST

I'd love to see photos of what you guys have rigged. As far as the bulb goes wouldn't it make more sense to replace the JK light with an LED source? Where you using the original JK bulb? A 10 hour life seems to short for any sort of serious optical printing (of course at Cineworks with fingers crossed we're still using an ancient, yellowing bulb in our Oxberry printer). As far as the post flow goes, do you import the images as a Tiff sequence and then export it (after cropping) as ProRes or another format? Or is FCP able to handle it without a conversion? John Woods ________________________________ From: Mike Maryniuk WFG <email suppressed> To: Experimental Film Discussion List <email suppressed> Sent: Fri, December 10, 2010 4:05:30 PM Subject: Re: [Frameworks] DSLR telecine on a JK printer At the Winnipeg Film Group we have modified our JK to transfer film using a DSLR. Originally we just tested it by hand, one frame at a time. But now we’ve built a mechanism that auto-fires the camera so the process is automated and you can walk away for a while. To automate the shutter release on our Canon DSLR, we’ve created a mechanism that locks into the original piece that fired the Bolex one frame at a time. On the original setup, the JK bolex “motor” would turn 360 degrees to fire one 16mm shot. Now, we have it hooked up to a mechanism that completes a circuit with a remote shutter cable (wired, not wireless). If anyone is interested I can send some photos around next week if you want to see closer how this mechanism works… it’s kind of hard to describe. A couple problems with this method though: 1) I’ve had to replace the shutter on my 40D after transferring a few films. It was just over $100 to fix the shutter I believe, so that’s nothing compared to the costs of HD transfers. 2) The bulb in the JK light that we have only lasts for something like 10 hours, so we’ve gone through countless bulbs. That was, until I realized that we could just use a 300 watt Arri instead, which seems to have a longer bulb life. And since we’re working digital and the light doesn’t have to be measurable this method has worked great. The benefits: 1) Upwards of 5K image on your transfer. FCP kind of freaks when you throw all the photos into it at first, but it gives you a great quality image to work with, and export as video. 2) You can capture the FULL frame of film and decide yourself how to frame it, which often is not the case when getting traditional transfers. 3) Cheap as borsht. If anyone has questions, feel free to ask. I’ll try to upload photos of our automated mechanism on Monday. -Aaron Zeghers- From:email suppressed [mailto:email suppressed] On Behalf Of George Monteleone Sent: December 8, 2010 4:07 PM To: Experimental Film Discussion List Subject: Re: [Frameworks] DSLR telecine on a JK printer I can't speak for JK to DSLR, but and friend and I built a variant of the workprinter, but with better optics. We capture directly off the frame, and the only glass in the optical path is a high-resolution rodenstock apo-rodagon enlarging lens to Sony EX1 camera with an HD-SDI out, uncompressed 1080 signal to blackmagic caputre card. It's basically a Moviestuff workprinter setup with better optics. Our transport is just a modified Eiki with a adjustable speed control, low-wattage bulb, and variable aperture electronically controlled. We capture using CaptureMate, the same thing the workprinter is designed to use, frame captures triggered with an opto-resistor triggered by the motor rotation. It's quite reliable; the only thing to watch for is dust or occasional jump if the film has bad splices or damaged sprockets. A JK transport would be ideal, or some kind of pin-registered transport, though registration on the Eiki at 8fps is ok. Theoretically, and upgrade to higher quality capture mechanisms (i.e. Red cameras) wouldn't be too tough, as long as the optics are appropriate for the chip size. The quality is better than the workprinter. We've been running it as and affordable DIY telecine business, but might be planning to sell the system in the near future. Email me if you're interested in hearing more, arranging to see some samples, a quick cheap demo transfer, etc. -George email suppressed On Mon, Dec 6, 2010 at 4:04 AM, <email suppressed> wrote: i have done that several times a longer time ago, but you never know when the shutter rips off, so if you calculate yourself after 20000 clicks about the possibility the in the middle of the project it kills itself you can do that very easily. you have to have a replace-camera in your repertoire and looking forward for replacement costs of 100-200 bucks each time ... and a lot of nerves ;) but then it works. of course a 5d will stay longer as a 500d, but i would rather use the cheap one for that job ... nowadays i only use that for making telecine of finished works and not for production process anymore... On Sun, 5 Dec 2010 22:36:41 -0700, jeanne LIOTTA <email suppressed> wrote: > they are doing that at my school. But you have to watch > out--perhpasreplace the camera fairly regularly since they werent > really made for that kind of frame-clicking volume. Its tedious, just > like any optical printing, no? but with a controller interface you > trust maybe you can just go out for coffee or take a nap. > another one of the million workflows.... > > On Sun, Dec 5, 2010 at 6:04 PM, John Woods wrote: > Anyone doing film transfers on a JK optical printer with a DSLR? > Particularly of > S8 or 16mm colour negative? Seems like the most tedious way to > > transfer film but the potential quality it presents intrigues me. > Thx. > > John Woods > > _______________________________________________ > FrameWorks mailing list > email suppressed [2] > [3] _______________________________________________ FrameWorks mailing list email suppressed __________ Information from ESET NOD32 Antivirus, version of virus signature database 5693 (20101210) __________ The message was checked by ESET NOD32 Antivirus. __________ Information from ESET NOD32 Antivirus, version of virus signature database 5693 (20101210) __________ The message was checked by ESET NOD32 Antivirus.

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