Dennis Toeppen Posted September 30, 2022 Share Posted September 30, 2022 Hello, I need to shoot a sequence of moves by a railroad semaphore signal. Sequence takes about 12 minutes from start to finish. I've tried shooting at 8 fps as a poor substitute for time-lapse. It is a poor substitute for time-lapse. Does anyone know manufacturer/model of an inexpensive device that can facilitate shooting time-lapes with 235? Thanks in advance for any knowledge/experience you toss my way. Link to comment Share on other sites More sharing options...
Mark Dunn Posted September 30, 2022 Share Posted September 30, 2022 (edited) Tbe manual says the 235 runs down to 1fps, that's 30 seconds for your sequence. Or you could shoot faster and have options in post. Maybe you can even speed adjust your existing 8fps sequence. As to an external controller, no specific knowledge, sorry. The manual doesn't mention one. Edited September 30, 2022 by Mark Dunn Link to comment Share on other sites More sharing options...
Dennis Toeppen Posted September 30, 2022 Author Share Posted September 30, 2022 Huh. For some reason, I thought 8 fps was the minimum for this camera. It could be that I didn't want to venture below 1/8 second esposure due to motion blur. Link to comment Share on other sites More sharing options...
Mark Dunn Posted September 30, 2022 Share Posted September 30, 2022 (edited) 13 minutes ago, Dennis Toeppen said: Huh. For some reason, I thought 8 fps was the minimum for this camera. It could be that I didn't want to venture below 1/8 second esposure due to motion blur. I found a manual here through the wiki page https://cameramarket.eu/data/pdf/cameramarket_arri 235 manual.pdf page 60-61 'Frame Rates' It would as you say be 1/8 at 45deg. shutter at 1fps, but if you shot at a higher rate (1/64 at 8fps?) I don't know how a speed adjustment in post would work out. Edited September 30, 2022 by Mark Dunn Link to comment Share on other sites More sharing options...
Dennis Toeppen Posted September 30, 2022 Author Share Posted September 30, 2022 Oh, interesting. I didn't think about shutter angle. I have a shutter tool, but I'm afraid to use it. I was planning on displaying it as time-lapse, rather than correcting back to real time. Thanks for the shutter angle comment. That was very helpful. There's a good chance I'll try <8 fps with shutter closed down. I'm still interested in learning if there is any intervalometer box I can use. I could avoid troublesome shutter fiddling in the field if I had a device. Link to comment Share on other sites More sharing options...
Mark Dunn Posted September 30, 2022 Share Posted September 30, 2022 This camera came in at the tail end of the film era so it could just be that no-one thought it worthwhile to produce an aftermarket controller for it, assuming it would have been possible to do so. What about just switching on, letting a frame click over, then switching off, once every few seconds as required. Or doing it with the Arri wireless controller in the manual. Or, if you can work out the remote socket pinout, wire up your own switch. Link to comment Share on other sites More sharing options...
Dennis Toeppen Posted September 30, 2022 Author Share Posted September 30, 2022 That would work fine until signal moves and train enters frame. My inability to precisely trigger shutter would lead to jumpy motion. Funny that an advanced camera can't do something easy. I don't think it can even do single frame at a reasonable shutter speed. Even a Bolex RX5 can do that ? Link to comment Share on other sites More sharing options...
Premium Member Uli Meyer Posted September 30, 2022 Premium Member Share Posted September 30, 2022 1 hour ago, Dennis Toeppen said: That would work fine until signal moves and train enters frame. My inability to precisely trigger shutter would lead to jumpy motion. Funny that an advanced camera can't do something easy. I don't think it can even do single frame at a reasonable shutter speed. Even a Bolex RX5 can do that ? It just wasn’t built for that. There is a capping shutter for the 435 to shoot single frames and back in the day that may have been the Arri camera to go to for 35mm time lapse? Link to comment Share on other sites More sharing options...
Robin Phillips Posted September 30, 2022 Share Posted September 30, 2022 IIRC the 435 was trigger-able by Kuper and other motion control software, along with the intervalometer controller that I think came with the capping shutter, I believe thru the CCU port. not sure if that intervalometer works on the 235 or not. The 435 was the vfx camera of its era, so its possible they kept those functions exclusive to it thru the Xtreme era Link to comment Share on other sites More sharing options...
Andrei Lyskov Posted October 26, 2022 Share Posted October 26, 2022 The RCU-1 is an accessory that is supported on the 235. It allows ramps and adjustments to the frame rates, and might be a good thing to look into. Its definitely possible to shoot 1 fps with it, maybe smaller increments too. Link to comment Share on other sites More sharing options...
Premium Member Uli Meyer Posted October 26, 2022 Premium Member Share Posted October 26, 2022 10 minutes ago, Andrei Lyskov said: It allows ramps Keep in mind that the 235 doesn't have an electronic shutter and you have to use a ICU to do speed ramps plus a KC-88 cable. Link to comment Share on other sites More sharing options...
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