kamiel doens Posted October 17, 2021 Share Posted October 17, 2021 Hi all, Which 16 mm camera can do a speedramp internally, like a 435 Xtreme? Post is no option for me. I saw the RCU-1 also works with the Arri SR3 but I don't find any information if the ramping works on the SR3. Any other camera's? Cheers, Kamiel Link to comment Share on other sites More sharing options...
Premium Member Dom Jaeger Posted October 18, 2021 Premium Member Share Posted October 18, 2021 http://www.davidelkins.com/download/download_files/arri/technical_info/ramp_tutorial.pdf https://www.cinematography.net/edited-pages/Ramp-Shots.htm Arri 416 can also do ramping using something like an RCU-1 or WRC-1, see the manual: http://www.davidelkins.com/cam/manuals/manual_files/arri/416_manual.pdf No 16mm camera can do controlled internal ramping as far as I know, you always need an external controller. No shutter angle compensation either, only iris. You can always use older cameras with analogue speed governors (not electronic steps) like a Bolex or something and manually adjust the speed dial while opening the lens up, but that requires planning and skill and probably an extra pair of hands! 1 Link to comment Share on other sites More sharing options...
Nicholas Kovats Posted October 18, 2021 Share Posted October 18, 2021 And to add to Dom' s excellent research. I found a 2000 era document that details Arri's primitive implementation of a software controller for speed ramps, i.e. Ramp Preview Controller 1.0.0 Operations Guidehttp://www.davidelkins.com/download/download_files/arri/accessories/ramp_previw_manual.PDF Arri definitely had the most comprehensive film based speed ramp systems. From Dom's ramp tutorial link, i.e. "On the 535, 535B, 435, 435ES and 16SR 3, as well as on the 16SR 1 & 2 and 35-3 type cameras, the Iris Control Unit (ICU) can be used to compensate for the exposure change. The ICU will slave to the speed of the camera and vary the lens iris opening accordingly. This is called a speed/iris ramp." Link to comment Share on other sites More sharing options...
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