Watch this video in 2D or 3D.
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Here is the mirror on the end of a yardstick that I made this morning for measuring the near point for stereoscopic 3D, and for peeking at the LCD screen on the back side of the camera when shooting documentary style talking head vlogs.
The total cost of materials was under $3 via Home Depot and a Dollar Store.
This video was shot with a Sony Bloggie 3D.