Shutter Control....
Quick note while traveling - I "think" I may have a mini-breakthrough regarding the Shutter.
I'll get into more detail later but see what you think. I believe 30, 40, 50 are all 30 fps and 60, 80, 100, are all 60 fps. If so, then getting a consistent 60 fps is very simple and immediately repeatable. More lata. |
Hi Jim,
We didn't test 1/30, but we found that 1/40 and 1/50 produced the same result. 1/60, 1/80 and 1/100 also produced similar results, but the exposure varied a bit. The 1/100 speed seemed to be artificially dark (lower gain), but the blur was the same as 1/60 and 1/80. From my measurements 1/40 and 1/50 are actually someplace in between. Let's call it 1/45. And 1/60, 1/80, and 1/100 are actually delivering about 1/80. Here are the details: ~ The Murder of Dirk Snowglobe - Article: 5D Mark II Shutter Exposed! ~ |
I actually saw your test Jon, but it wouldn't make sense for 1/60, 180 and 1/100 to be 1/80...certainly not from Canon's perspective. These guys know cameras and shutter speeds and 30/60/120 make sense....1/80 doesn't. So I would assume, if Canon is only allowing for some multiplication of 30p regardless of what the screen shows then it would fall to 1/60 not 1/80.
That's an assumption on my part obviously. |
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from my experience with the camera, i can say i agree about your theory. My camera tends to say it is doing 1/50th or 1/40th a lot but it always looks like 1/30th, whereas 1/60th which only engages when iso200 is still too bright does appear to be a noticeably faster shutter. this makes some sense given that when the camera reads slower than 1/30th it is obviously applying extra gain rather than actually using a shutter other than 1/30th. I would not be surprised if 1/30, 1/60, 1/120 were real shutter speeds and anything in between was just gain adjustments. its all a bit of a pain but in the end as long as i have options of 1/30th, something that looks faster than 1/30th for a normal 180degree shutter look, and another option faster than that for action shooting, then I'll live with it.
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The motion blur of the video at 1/40 and 100 ISO is shorter than the motion blur of the photo at 1/40 and 100 ISO. And it's longer than the motion blur of the photo at 1/50 and 100 ISO. There's no doubt that the video shutter is someplace between 1/40 and 1/50, assuming the photo shutter speed is accurate. It's conclusively not 1/30. And look at the motion blur of the photo at 1/80. It looks identical in length to the motion blur of the video at 1/60, 1/80 and 1/100. Logic might dictate that ~1/45 and ~1/80 make no sense, but the test shows that that's what the camera is actually doing. Again, this assumes that the camera's shutter speeds are accurate for photos. |
Good luck tryna get the film-look shutter... after extensive testing and forum reading I have yet to see a 180 degree shutter consistently - the camera almost always uses 1/30th (360 degree aka video/collateral look) for the simple reason that all but NTSC countries will strobe/flicker so canon hides a MULTITUDE of sins (rolling shutter, strobe, etc.) with their crappy shutter.
I just sold the damn thing cos Im only happy with proper film shutter look which is a ball-ache tryna repeat CONSISTENTLY. |
Well isn't the thing about this camera that it doesn't look like video OR film. It has it's own look... and more important; feel. The Collateral comment, makes me react, because that film made me... hmmm.... feel or at least reflect over the images that I watched. What I'm looking for in this cam is a different look, not semi-video or semi-film - just pure-different.
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Jon, look at the EXIF data in the photos and that should indeed tell you what the shutter speed is.
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