Installed on a quick release plate and then attached to the fluid video head. I then attached a 3kg 10x50 pair of binoculars to it. It worked well. My eyes have a narrow pupillary distance. The straps don't destroy the bridge to expand my fit. I give it 4 out of 5 stars for (1) no anti-rotation rubber on the tripod thread and (2) too expensive for a flimsy plastic piece.
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