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January 23, 2009Pinhole/Zoneplate

La Petite Gemme Prairie

   Dry-mesic
Scenic upland
Topographic quadrangle

H ere is an image of a remnant prairie next to an abandoned railroad trail conversion near Bolivar. The goal was to test a new optic I had recently assembled, which incorporated a variable pinhole and a small defocus lens. By changing the pinhole diameter, the degree of sharpness is controlled. To make this image, several separate exposures each employing a different aperture size, were combined as HDR sources. At the smallest pinhole diameter, diffraction has created an interesting wavelength spectrum dispersion.

“There is no such thing as a failed experiment, only experiments with unexpected outcomes.” - Richard Buckminster


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