Focal-plane Shutter: How it works Watch this little video to understand how the shutter (focal-plane type) works on your DSLR. Pay close attention to the shutter speed and its effect on how the shutter curtains move. In a focal-plane shutter, there are two curtains, one is the front curtain and other is the rear curtain. In this video, it shows how at slower shutter speed of 1/100, the front curtain opens up first exposing the entire sensor and stays open for a short duration before the rear curtain comes in and blocks the sensor, ending the exposure. On the other hand, at a faster shutter speed of, for instance, 1/1000, the front curtain begins moving first, and immediately following it closely is the rear curtain. Therefore you can see a slit of space that is exposing the sensor, instead of the whole sensor exposed instantly. As the two curtains travel from top to bottom following each other at exactly the same speed, the slit of open space exposes the image from top to bottom and eventually closes the shutter and exposure is complete. This video is critical to understanding the role of a focal-plane shutter in flash photography. Every camera has a maximum flash sync-speed and its linked to the mechanism of a focal-plane shutter. Courtesy Hammad Iqbal Photography youtu.be/0dVmGVa3Rbw
Posted on: Tue, 30 Dec 2014 18:29:14 +0000
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