Why does the EM-1 have a DOF Preview button?

Started Sep 20, 2013 | Discussions thread
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turnschuh
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Why does the EM-1 have a DOF Preview button?
Sep 20, 2013

Hello,

by default one of the Front-Lens buttons on the EM-1 is set to "DOF Preview". So I wonder why does the EM-1 need that Button? Doesnt it like other mirrorless cameras always show the right aperature?

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Nikon D7100 Nikon AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR Nikon AF-S Nikkor 50mm f/1.8G Nikon AF-S Nikkor 70-200mm f/4G ED VR
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