tanner wolfe Posted February 18, 2007 Share Posted February 18, 2007 i was recently watching minority report. i noticed flares or lens aberations covering most of the frame. they are vertical and occur during fight between cruise and colin farrell, when they are on a gantry above a robotic car factory. it reminds me of some of the work done on saving private ryan. curious what the effect is that he employed. cordially, tanner Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted February 19, 2007 Premium Member Share Posted February 19, 2007 The vertical smearing of bright highlights comes from deliberately mistiming the shutter. Normally the film does not advance in the gate to the next frame until the shutter is completely closed over the gate, but when the shutter is mistimed, the film starts to move before the shutter is completely closed, so the last few moments of the exposure are happening to a moving piece of film, causing brightest highlights (the only thing to register in this brief exposure moment) to get smeared vertically. The movie was also shot with net diffusion filters, which can cause some star-shaped flares. Link to comment Share on other sites More sharing options...
Chayse Irvin ASC, CSC Posted February 19, 2007 Share Posted February 19, 2007 The vertical smearing of bright highlights comes from deliberately mistiming the shutter. Normally the film does not advance in the gate to the next frame until the shutter is completely closed over the gate, but when the shutter is mistimed, the film starts to move before the shutter is completely closed, so the last few moments of the exposure are happening to a moving piece of film, causing brightest highlights (the only thing to register in this brief exposure moment) to get smeared vertically. The movie was also shot with net diffusion filters, which can cause some star-shaped flares. How do you adjust the shutter to do this David? Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted February 19, 2007 Premium Member Share Posted February 19, 2007 Hi, On some modern cameras, it's a menu option - it can even be done during the shot, an effect I believe can be seen in Gothika. On others, it's a mechanical adjustment which should really be done in a workshop. Many cameras do not offer very practical means of doing it at all; the issue is not so much doing it, as undoing it afterward. I have retimed the shutter on several different film projectors - where shutter mistiming has more or less the same effect - and it can be very tricky to get right. Phil Link to comment Share on other sites More sharing options...
Chayse Irvin ASC, CSC Posted February 19, 2007 Share Posted February 19, 2007 Thanks Phil, Whats the effect actually called? What would it be called in a menu? Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted February 19, 2007 Premium Member Share Posted February 19, 2007 Hi, "Shutter phase" or "shutter sync" or something like that. Not to be confused with the "phase" button on the side of the movement, which will simply waste 1.3 inches of film. Phil Link to comment Share on other sites More sharing options...
Premium Member Max Jacoby Posted February 19, 2007 Premium Member Share Posted February 19, 2007 On cameras with an electronic shutter you can desycnchronize it with the menu (and an extra sync box in case of Arri if my memory serves correctly. Those cameras include the Arricams, the 535A and the new 435s (ES, Advanced & Extreme). On Panavision cameras it's the Millenium and the XLs Link to comment Share on other sites More sharing options...
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