Comments on: Nikon D3 Shutter Release in Super Slow Motion http://regex.info/blog/2008-09-04/925 Not a photo blog, but sometimes I play one on TV Sun, 14 Mar 2010 20:32:10 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: David Hardwick http://regex.info/blog/2008-09-04/925#comment-38235 David Hardwick Tue, 16 Feb 2010 00:11:24 +0000 http://regex.info/blog/2008-09-04/925#comment-38235 How complicated is that. It should last aprox. 250K shots. It is amazing how delicate it all looks. How complicated is that. It should last aprox. 250K shots. It is amazing how delicate it all looks.

]]> By: A. Paschal http://regex.info/blog/2008-09-04/925#comment-35091 A. Paschal Tue, 21 Apr 2009 13:24:05 +0000 http://regex.info/blog/2008-09-04/925#comment-35091 It is amazing seeing the action of what many had been wondering how it works 'Camera Shutter' with 3D. with the above breake down one need not ask much ambiguious question of how a clear Photograph come to be. My curiosity about Digital Cameras are gradually taking shape. I like what I saw. please Keep up the good work. I am impressed. Well I am Grphic Designer, from Nigeria. I can not do without a digital Cameras in my profession. I am relief being elittened. A. Paschal Nigeria It is amazing seeing the action of what many had been wondering how it works ‘Camera Shutter’ with 3D. with the above breake down one need not ask much ambiguious question of how a clear Photograph come to be.

My curiosity about Digital Cameras are gradually taking shape. I like what I saw.
please Keep up the good work. I am impressed.

Well I am Grphic Designer, from Nigeria.
I can not do without a digital Cameras in my profession. I am relief being elittened.

A. Paschal
Nigeria

]]> By: William Rackley http://regex.info/blog/2008-09-04/925#comment-34619 William Rackley Fri, 06 Mar 2009 18:11:29 +0000 http://regex.info/blog/2008-09-04/925#comment-34619 Incredible! Thank you so much for posting this. Incredible! Thank you so much for posting this.

]]> By: adolfo.trinca http://regex.info/blog/2008-09-04/925#comment-34616 adolfo.trinca Fri, 06 Mar 2009 06:37:02 +0000 http://regex.info/blog/2008-09-04/925#comment-34616 Great job! Great job!

]]> By: Boyd http://regex.info/blog/2008-09-04/925#comment-34610 Boyd Thu, 05 Mar 2009 15:44:53 +0000 http://regex.info/blog/2008-09-04/925#comment-34610 Sorry for the late comment, but I was directed here today from a post at <a href="http://feedproxy.google.com/~r/DigitalPhotographySchool/~3/Szaz-AMrr0E/photography-1016-shutter" rel="nofollow">DPS</a>. Great visual explanation of what happens when we press that little button! One minor point I thought I'd bring to your attention, though. Before the exposure and continuing through its duration, you refer to the first shutter we see as the "front shutter" and the second one as the "rear shutter." When this second shutter returns, you switch and call it the "front shutter." I think you got it right at the end. The shutter that drops out of the way at the beginning of the exposure is actually the rear shutter, which is why we don't see it return after the exposure. The second shutter is actually in front, hiding the other shutter until it returns at the end. Not that it makes a whole heckuva lot of difference, but being the anal retentive type, I thought I'd point that out to you. Again, great job, and thanks! Sorry for the late comment, but I was directed here today from a post at DPS. Great visual explanation of what happens when we press that little button!

One minor point I thought I’d bring to your attention, though. Before the exposure and continuing through its duration, you refer to the first shutter we see as the “front shutter” and the second one as the “rear shutter.” When this second shutter returns, you switch and call it the “front shutter.”

I think you got it right at the end. The shutter that drops out of the way at the beginning of the exposure is actually the rear shutter, which is why we don’t see it return after the exposure. The second shutter is actually in front, hiding the other shutter until it returns at the end.

Not that it makes a whole heckuva lot of difference, but being the anal retentive type, I thought I’d point that out to you.

Again, great job, and thanks!

]]> By: Nathan Stam http://regex.info/blog/2008-09-04/925#comment-27758 Nathan Stam Tue, 18 Nov 2008 17:58:51 +0000 http://regex.info/blog/2008-09-04/925#comment-27758 Further thought. If it is the actuator for the aperture, it would be a good counter weight because automatic apertures always return to an original position, wide open. I have taken a few lenses apart in my short day, and have broken springs that pull the aperture back open. A good possibility? ~nathan Further thought. If it is the actuator for the aperture, it would be a good counter weight because automatic apertures always return to an original position, wide open. I have taken a few lenses apart in my short day, and have broken springs that pull the aperture back open. A good possibility?
~nathan

]]> By: Nathan Stam http://regex.info/blog/2008-09-04/925#comment-27756 Nathan Stam Tue, 18 Nov 2008 17:52:59 +0000 http://regex.info/blog/2008-09-04/925#comment-27756 Steve Jones wrote: "...By using suitable cams it also ought to be possible to accelerate and decelerate the mirror assembly smoothly. I suspect that the device seen on the left is part of such a mechanism." Hey Steve, I believe it is just the mechanical arm to actuate the aperture! I don't know much about Nikon cameras though! ~nathan Steve Jones wrote:
“…By using suitable cams it also ought to be possible to accelerate and decelerate the mirror assembly smoothly. I suspect that the device seen on the left is part of such a mechanism.”

Hey Steve,
I believe it is just the mechanical arm to actuate the aperture! I don’t know much about Nikon cameras though!

~nathan

]]> By: Steve Jones http://regex.info/blog/2008-09-04/925#comment-26439 Steve Jones Wed, 12 Nov 2008 17:35:44 +0000 http://regex.info/blog/2008-09-04/925#comment-26439 It's noticeable that there is something on the left that moves in the opposite direction to the mirror. I suspect this is associated with some form of counterweight. The law of conservation of angular momentum dictates that as the mirror is accelerated upwards on it's access, there will be a counter-reaction which will act to rotate the camera body and lens downwards. When the mirror hits the buffers at the top of it's travel, then the reverse will happen and the downward motion of the lens/camera would be halted. However, the such an action will almost inevitably cause some form of oscillation, even where the camera is mounted to a sturdy tripod. Even though the mirror is much lighter than the camera/lens combination, with a heavy FF mirror, and the necessary very fast acceleration to cope with a 10+ FPS camera, the effect will be noticeable (one of the reasons that mirror lock-up was invented). Also stopping such a heavy, fast moving item smoothly without some bounce is difficult. One excellent way of counteracting this is to have a counterweight moving in the opposite direction in order to cancel out the angular momentum caused by the mirror movement. By using suitable cams it also ought to be possible to accelerate and decelerate the mirror assembly smoothly. I suspect that the device seen on the left is part of such a mechanism. It’s noticeable that there is something on the left that moves in the opposite direction to the mirror. I suspect this is associated with some form of counterweight. The law of conservation of angular momentum dictates that as the mirror is accelerated upwards on it’s access, there will be a counter-reaction which will act to rotate the camera body and lens downwards. When the mirror hits the buffers at the top of it’s travel, then the reverse will happen and the downward motion of the lens/camera would be halted. However, the such an action will almost inevitably cause some form of oscillation, even where the camera is mounted to a sturdy tripod. Even though the mirror is much lighter than the camera/lens combination, with a heavy FF mirror, and the necessary very fast acceleration to cope with a 10+ FPS camera, the effect will be noticeable (one of the reasons that mirror lock-up was invented). Also stopping such a heavy, fast moving item smoothly without some bounce is difficult.
One excellent way of counteracting this is to have a counterweight moving in the opposite direction in order to cancel out the angular momentum caused by the mirror movement. By using suitable cams it also ought to be possible to accelerate and decelerate the mirror assembly smoothly. I suspect that the device seen on the left is part of such a mechanism.

]]> By: .felix http://regex.info/blog/2008-09-04/925#comment-25188 .felix Sun, 02 Nov 2008 04:52:09 +0000 http://regex.info/blog/2008-09-04/925#comment-25188 Wow, great work explaining how the shutter works. I'm assuming you had to take numerous shots and select only the ones that create a "flow" of the whole action. How did you freeze the motion in "mid air" of the curtains? Wow, great work explaining how the shutter works. I’m assuming you had to take numerous shots and select only the ones that create a “flow” of the whole action. How did you freeze the motion in “mid air” of the curtains?

]]> By: Rebel http://regex.info/blog/2008-09-04/925#comment-21940 Rebel Thu, 02 Oct 2008 21:18:35 +0000 http://regex.info/blog/2008-09-04/925#comment-21940 It"s fantastic! Very nice ;) It”s fantastic!
Very nice ;)

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