Depth of field preview button

Started Dec 3, 2010 | Discussions thread
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Albert Drybrae Contributing Member • Posts: 529
Depth of field preview button

My depth of field preview button does not work. I wonder if it's the camera, the lens (I have only one lens so I cannot try another) or some setting that I'm not aware of?

Al

 Albert Drybrae's gear list:Albert Drybrae's gear list
Canon EOS 7D Tamron 16-300mm F/3.5-6.3 Di II VC PZD Macro
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