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You are here: Home / Archives for First curtain

First curtain

A reference to the focal plane shutters used in DSLR and mirrorless cameras, where a ‘first curtain’ moves aside to expose the sensor ahead of a ‘second curtain’ which follows it and covers the sensor again to end the exposure.

Shutters: what they do and how they work

September 9, 2019 by Rod Lawton

All cameras have a shutter mechanism to expose the sensor for exactly the right amount of time. The shutter opens to begin the exposure and then closes again to end it. Most cameras have mechanical shutters, though you can also get electronic shutters, which we’ll come to a little later. Mechanical shutters come in two […]

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