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31. Rolling shutter @ identical panning speed: Canon 7…
2 months ago
this is an update to my first test, a bit more conclusive.
please check my blog for a few more discoveries during this test, download the 720p versions from here.
mikekobal.com/blog/?p=311

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32 Likes

  • Brian Wiley 2 months ago
    Not bad. I don't mind the rolling shutter too much. Coming from a background in animation, I consider it; real world squash and stretch.
    Just as long as the image doesn't stop like jello. Then theres a problem.
  • Mike Kobal plus 2 months ago
    me neither. just good to see when you pan insanely fast it will show
  • Andrew Howe plus 2 months ago
    Thanks for the new test Mike

    Speaking as a relative laymen here. I wouldn't be disconcerted by the effect on a steady pan. A lot of folks posting DSLR films are using wide angle zoom lenses at the wide end (16-35, 17-40, 24-70 etc). I wouldn't be expecting straight verticals in my stills with those without a little help from DXO. Where it really jars is on the direction change. How often would you do that? In the circumstances when you would pan that fast, wouldn't the distortion be beneficial adding to the sense of speed or disorientation?

    Maybe we should be a bit more forgiving of these technology quirks. In 20 years time we will be buying plugins to simulate rolling shutter to give it that authentic Noughties look
  • Campus Liquors plus 2 months ago
    So true. I like that.
  • I feel like im about to get shot for saying this, but I often feel that rolling shutter enhances the feeling of speed. Say your moving the camera sideways, following along someone running in the streets. The far background can be blurred and have some rolling shutter, I actually feel that it gives a good sence of speed that way
  • David Tate plus 1 month ago
    The problem with your theory that the rolling shutter is like a real-life squash and stretch is that the rolling shutter causes the tops of objects to go in the direction the camera is moving before the bottoms of objects. Isn't it reversed in squash-and-stretch? If the camera is whip-panning to the right ==>, for instance, shouldn't a building look like this \ \ instead of like this / / ?
  • Brian Wiley 1 month ago
    true.
  • David Tate, I know that, but its just a personal opinion. But my opinion is based on practice and not theory, so Im painfully aware of it not being realistic. I still think it gives that effect even if its pointing "forward" in terms of panning direction. But still, kudos for pointing it out. BTW; another thought;
    What would happen if the camera was upside down? wouldnt the sensor in theory scan from bottom up? and this reversing the "skew direction"?
  • Jay Johnson 1 month ago
    ...owch. I think you just blew my mind.
    Okay, now my head REALLY hurts.

    I love trying to keep up with you guys, but I clearly don't know my limit. ;)
  • I know what you mean, theres alot of talented people on vimeo/youtube/forums and such and its hard to keep up sometimes.
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  • Hi Mike. Can you do GH1 too?
  • Mike Kobal plus 2 months ago
    I will, eventually....
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  • Peter Olsen 2 months ago
    I can't tell a thing with the way the image stutters. Is that the in-camera compression or the web compression?
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  • Sebastian Gutierrez 2 months ago
    i don't know which of those cameras to buy yet, the one does this the other that, detail here, there, ugghhh anyway nice tests mike. thks

    *sorry mike if it not to much to ask take a look at one of my projects and recommend me a hd camera please vimeo.com/5745683
    SD is dead!
  • Mike Kobal plus 2 months ago
    hey sebastian, just checked your video, any of the dslr will do a great job
  • Sebastian Gutierrez 2 months ago
    thks m.
  • 24P firmware for 5D has been OFFICIALLY confirmed now! That is a HUGE plus when considering what body to buy!
    Im so happy right now :)
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  • Mihnea de Vries 2 months ago
    well, but no experienced cinematographer will move the camera so fast without following a subject, which case the rolling shutter effect or jello will not be in the center of interest anymore.. in my opinion both 5d and 7d jello effect is acceptable in 99% of cases
  • I personally think, that in the case of following a subject, sometimes rolling shutter effect can be beneficial. Now it's only my personal opinion and I wont be getting into to a discussion with anyone. If you disagree, you're probably right anyway :P I just feel like it enhances the feeling of speed or "rush" if you have a dramatic running scene.
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  • v.striemer 2 months ago
    Yes, Mihnea de Vries say it right.
    BTW: in professional cameras like the Ikegami HDN-X10 (CMOS Sensor) I never see a rolling shutter.
    There is inside a very effectively electronic to compensate
    this effect. May be in some years we will find this compensate electronic in all DSLR with movie function.
    thx for the test !
  • You are right but for example on the ikegami you will still have aliasing if you look for it,,,
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  • Trammell Hudson plus 2 months ago
    I've done a top-to-bottom comparison of the two cameras' rolling shutters, comparing all of the 7D's modes to the 5D's 30p. vimeo.com/6986229
  • Mike Kobal plus 2 months ago
    very helpful. looking at all the tests out there it seems the slight 7D advantage is due to the smaller sensor. (less to scan) what' s your take on that?
  • indyflix plus 1 month ago
    It also might be to the fact that it has TWO digic 4 processors, instead of one like in the 5d.
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  • Brian Wiley 1 month ago
    If the jello bugs anyone, I believe there is plug-in software that corrects it, I've seen a demonstration on youtube.
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  • Jay Johnson 1 month ago
    Hey Mike, this was a great test. Now I can finally see what so many folks have been talking about. This was a very helpful perspective. Thanks for sharing your great work with all of us.

    By the way, is the skipping effect seen even in the slowest of pans for both cameras caused by the compression Vimeo has? Or is this related to the shutter speed of 1/80 combined with 30p?

    I've read that a good rule to follow with the 5D & 7D is doubling the frame rate to get the proper shutter speed... or were you using 1/80 for a particular reason? (I'm still learning, so my thanks for any help/advise/wisdom you can share).
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