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Parametric Camera Filter Adapter
by schlem
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I designed this as a way of adding a Neutral Density (ND) filter to the front of the P6*6 Pinhole camera.
http://www.thingiverse.com/thing:157844
Decreasing the amount of light exposing your film is a handy way of slowing down an exposure in very bright light. A "fast" pinhole exposure might be 1 or 2 seconds long. At these shutter speeds, the slight camera shake induced by opening and closing the shutter can blur the photograph.
ND filters are made in whole "stops". Further, each stop
http://www.thingiverse.com/thing:157844
Decreasing the amount of light exposing your film is a handy way of slowing down an exposure in very bright light. A "fast" pinhole exposure might be 1 or 2 seconds long. At these shutter speeds, the slight camera shake induced by opening and closing the shutter can blur the photograph.
ND filters are made in whole "stops". Further, each stop
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