Mamiya 75mm f2.8 medium format lens reversed on a Nikon 105mm f2.8 macro with PN-11 (52.5mm) extension tube for aprox 3.5x.
Subject is a straight razor blade that I clipped a grill electronic ignition to. Besides the sparks the razor is lit by a Nikon SB-80DX flash connected to the camera via SC-17 flash cord.
Kind of tongue and cheek, but get it electric razor.
setup-
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