Duca Simon Luchini Posted June 24, 2016 Share Posted June 24, 2016 Hi everybody, I'd like to shoot a "first person" sequence with minimal possible motion blur because we have to make an extensive motiontracking (Matchmoving) of the entire sequence. So, I thought would be a good idea to shoot at a "normal" frame rate ( (24 or 25 or 30 fps) but acting the scene very slow and than accelerate the sequence in post. Or , maybe, I should shoot with 60 or 120 fps (I don't have a Phantom....) to try to avoid motion blur. Any other suggestions? Many thanks for a reply. Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted June 24, 2016 Premium Member Share Posted June 24, 2016 You can avoid motion blur by simply increasing the shutter speed (decreasing shutter angle). Increasing frame rate can also help, but going from 24 - 30 may not help enough. I shoot at 45 deg shutter all the time and my stuff has very little motion blur @ 24fps. Link to comment Share on other sites More sharing options...
Duca Simon Luchini Posted June 25, 2016 Author Share Posted June 25, 2016 Hi Tyler, normally shutter angle should be double of the Frame rate, right? So if I shoot at 24 fps, I should have a 48° shutter angle. You used 45°... it seem to be a very small difference. Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted June 25, 2016 Premium Member Share Posted June 25, 2016 Well, it's a digital camera, so it can run shutter angles that film cameras can't. Most digital and film cameras run 180 degrees stock. A high speed camera would help resolve the motion blur issue, but at an added cost. Link to comment Share on other sites More sharing options...
Evan Walsh Posted June 25, 2016 Share Posted June 25, 2016 Hi Tyler, normally shutter angle should be double of the Frame rate, right? So if I shoot at 24 fps, I should have a 48° shutter angle. You used 45°... it seem to be a very small difference. I think you might have gotten it mixed up, a 180º shutter angle would translate to 1/48th of a second exposure time. If the camera you're using doesn't have a shutter angle option, you could turn it up to 1/144th or 1/240th exposure time to lessen the motion blur. Spike Lee's 25th hour has some high shutter speed sequences and the movement of the actors is very sharp if that's what you are going for. Link to comment Share on other sites More sharing options...
Duca Simon Luchini Posted June 25, 2016 Author Share Posted June 25, 2016 I think you might have gotten it mixed up, a 180º shutter angle would translate to 1/48th of a second exposure time. If the camera you're using doesn't have a shutter angle option, you could turn it up to 1/144th or 1/240th exposure time to lessen the motion blur. Spike Lee's 25th hour has some high shutter speed sequences and the movement of the actors is very sharp if that's what you are going for. Ah, ah, you are right! I confused my self, anyway is was the meaning... So, it could be ideal to use faster time exposure with 24, 25 or 30 fps. And of course, if I shoot at 60 fps or 120 fps, I should use even more faster shutter speed as 1/1000 or more (?). Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted June 25, 2016 Premium Member Share Posted June 25, 2016 Yea, you can use a super high shutter speed for sure. Link to comment Share on other sites More sharing options...
Maximilian Motel Posted July 11, 2016 Share Posted July 11, 2016 You could certainly use faster shutter speeds (like the 45° angle in Saving Private Ryan), but if motion tracking is your concern, I feel like modern software should be fine with motion blur as well. It'd probably be harder to add "correct" motion blur in post than to shoot and track with it straight out of camera. (Example with Mocha: https://www.youtube.com/watch?v=ZGDlW1QeY3c). Link to comment Share on other sites More sharing options...
Duca Simon Luchini Posted July 12, 2016 Author Share Posted July 12, 2016 You could certainly use faster shutter speeds (like the 45° angle in Saving Private Ryan), but if motion tracking is your concern, I feel like modern software should be fine with motion blur as well. It'd probably be harder to add "correct" motion blur in post than to shoot and track with it straight out of camera. (Example with Mocha: https://www.youtube.com/watch?v=ZGDlW1QeY3c). Of course, but the problem is to do a global matchmoving and not a single object tracking as in you example. Link to comment Share on other sites More sharing options...
Jon Kline Posted July 18, 2016 Share Posted July 18, 2016 I've done some work that was match-moved with a 1/48 shutter, but not handheld. I would do a test shot at 1/48 and see if it lines up easily. If you use a prime lens and are smart about keeping some trackable points in the frame, it probably won't be an issue. Link to comment Share on other sites More sharing options...
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