The Slow Mo Guys filming a shutter in slow motion

[PhotoByTrace]

I found this video interesting in terms of how the rolling shutter works and thought I'd share.

[dje]

That's a good demonstration of the rolling shutter Trace, clever method of using SloMo. His 7D has had a hard life !

[Shadowman]

Very nice, thoroughly impressed with the high speed cameras.

[xpatUSA]

Brilliant and very well-presented.

I was reading about sync-speed and stuff recently and that video was most illuminating (geddit, "illuminating"?).

[Stagecoach]

Both informative and well presented Trace.

Just goes to prove that no picture taken is a true representation of what the eye sees as the top is always older than the bottom

[PhotoByTrace]

Glad others found it "illuminating" It cleared up my perceptions somewhat, so hoped it might be useful, or at least interesting, to others too.

[NorthernFocus]

That was cool. Thanks for posting it. I knew the theory but seeing it in ultra slowmo was pretty cool. Made it much more convincing how much camera shake there is due to mirror and shutter motion.

[jcuknz]

Funny how people come up with fancy names for things which are as old as the hills ...mildly interesting to see a slow-mo of it happening so thankyou Trace for the link Couldn't understand a word the guy was saying though the pictures 'said' it all for me. It is just a focal plane shutter which some of us have been using in various forms for decades ... my first with a quarter-plate camera of my grandfather's...
EDIT ... found the drawing of one like it in 1948 British Journal of Photography ....

[mknittle]

Pretty cool. think about how fast those parts are moving at 10 frames per second.

[dje]

Pretty cool. think about how fast those parts are moving at 10 frames per second.

Mark a couple of things to note here.

I think the mirror stays up during burst shooting mode.

A guy over at LULA estimated from this video that the shutter curtains travel across the sensor in about 1/440 sec for the 7D. The second curtain is delayed by the exposure time. After exposure and data readout is complete, the curtains have to return to their normal position, presumably at the same speed as they travel when taking the exposure. Therefore the complete time taken for one shutter operation would be 2/440 sec plus the actual exposure time set, plus the data readout time. The curtain speed would not change with the burst rate and I don't believe it would be the limiting factor on burst rate. It would have relevance to flash sync speeds though.

Dave