Sigma 10mm f2.8 Fisheye
Some shots from the Sigma 10mm f2.8 Full Frame Fisheye. On the K-5 it covers about a 160 degree horizontal FoV, almost 180 degrees diagonally. Its got "problems" typical of fisheye lenses. Bit its very sharp in the center, even wide open. And can do great 1:4 or better macro. Its is decent for astro work.
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