D3 shutter: Within the blink of an eye

Started Sep 2, 2008 | Discussions thread
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Marianne Oelund Veteran Member • Posts: 7,788
D3 shutter: Within the blink of an eye
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Q: What do you get when you combine Marianne's curiosity with a holiday?
A: http://actionphotosbymarianne.com/D3shutter.html

The link allows you to download a slideshow file, showing the detailed movements of the D3 shutter, mirror and related mechanisms. What's especially valuable about this series, though, isn't just the images, but the timing data coded into the filenames.

You will notice that the frame time interval is variable. The time of each frame, relative to the start of the flash discharge, is coded into the filenames. The filenames are Dnn_mxxx.jpg or Dnn_pxxx.jpg. The two-digit nn is the frame number, and xxx is the time (m for minus, p for plus) in tenths of a millisecond. For example, D02_m399.jpg was taken 39.9msec before the flash, and D38_p137.jpg was taken 13.7msec after the flash.

The slideshow file was created by Irfanview, and uses those control conventions: Press Pause/Break to pause the slides, press cursor-left or cursor-right to move backwards or forward, and press Esc to exit the slideshow.

Now you can see how fast the various mechanical parts move - I think the shutter speed is quite impressive, and you can appreciate how difficult it is to design it to withstand so many cycles.

Enjoy!

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