Ikelite 4.125" SLR Flat Port for Nikon 60mm Macro D lens, Olympus Zuiko 50mm Macro F2.0 lens and Minolta 50mm Macro 1:2.8 lens. For standard, macro and telephoto lenses. (#5502.41) Due to refraction flat ports reduce the angle-of-coverage of a lens and at the same time enlarge the image. This makes the flat port ideal when using standard, macro or zoom lenses to shoot small subjects. Note that if a port is long enough to accommodate the full length of a 1:1 macro lens, the lens may vignette when used at infinity. If access to the lens' full range is desired, then select a dome port instead.
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