Tom Pollock Posted September 4, 2008 Share Posted September 4, 2008 I was panning across faces with a 50mm lens and when transfered it looked like it was strobing, can anyone explain why? Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted September 5, 2008 Premium Member Share Posted September 5, 2008 I was panning across faces with a 50mm lens and when transfered it looked like it was strobing, can anyone explain why? For the same reason that false motion blur and stretching are used in animation for fast motion. Your eyes refresh every 1/14th of a second or so. Any time you pan so fast that an object moves in frame more than it's own width in this period of time, it will appear to strobe rather than move. Link to comment Share on other sites More sharing options...
Sam Wells Posted September 5, 2008 Share Posted September 5, 2008 It's sometimes called "retinal skipping" -- caused by the fact the cells sensitive to light on your retina are spaced at around 7 minutes of arc - so if a lateral displacement occurs frame to frame that 'skips' the adjacent row if cells your brain would expect the object to be normally placed on your brain does not interpret the displacement as smooth continuous movement. A solution: pan more slowly or use a higher frame rate. -Sam Link to comment Share on other sites More sharing options...
Jonathan Bowerbank Posted September 5, 2008 Share Posted September 5, 2008 You see it a lot in the movie theatre with slow pans of shots that have a lot of vertical opjects (trees, etc.). Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted September 5, 2008 Premium Member Share Posted September 5, 2008 A solution: pan more slowly or use a higher frame rate. -Sam There's also another solution: increase shutter angle. This will increase motion blur which will help tie those strobing objets together into an illusion of motion. It's not the best solution or even a valid option most of the time but I thought I'd throw it out there. Link to comment Share on other sites More sharing options...
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