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Showing results for tags 'no parallax point'.
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Does anyone have a good measurement for the least parallax point for the Sigma 15mm fisheye (Nikon mount)? From the lens mount surface preferably. (It's not a "no parallax point" because it varies with angle of incidence, or something like that.) I am making up a 6" dome port and would like to put the center of curvature of the dome on the least parallax point.