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What is shutter release button?

What is shutter release button?

anju
Tue, 12 Jan 2010 13:37:45 +0000

The shutter release button is the button you click to take a photograph. This term came from the film cameras, where there is a shutter curtain that prevent the film from being exposed to the light. When you push this button, the shutter curtain slides away to expose the film at any given shutter speed. Then it slides right back and the film advances to the next frame.

The term is carried over to the digital camera, which usually doesn't require a shutter curtain at all (imager sensor can be turned on/off). Most digital point-and-shoot cameras doesn't have a shutter curtain. However, many early generation digital SLR cameras still had a shutter curtain.

Chieh Cheng
Tue, 12 Jan 2010 17:51:01 +0000

Digital point and shoot cameras do not have physical shutters per-se. They typically have Pockels (or similar.) Almost invariably, all digital SLR's (Single Lens Reflex) cameras all have physical focal-plane shutters (if we set the two or three modern digital SLR cameras that have Pockels-Cell, leaf or diaphram shutters aside.) The SLR camera is defined by a viewfinder that looks through a prism via a mirror and out through the lens. The mirror physically flips up and out of the way just before the physical shutter curtain withdraws to expose the sensor briefly.

http://en.wikipedia.org/wiki/Pockels_cell
http://en.wikipedia.org/wiki/Focal-plane_shutter
http://en.wikipedia.org/wiki/Shutter_%28photography%29

Cheers!

Rip Williams
Fri, 15 Jan 2010 11:50:57 +0000

I have canon T2I and I am learning about the shutters also. It seems pretty complicated.

John Harris
Wed, 01 Feb 2012 19:38:03 +0300

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