Sigma 1.4x EX DG Tele Converter

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Sigma 1.4X EX DG APO review by andre_

I use this TC with the Sigma 150mm f2.8 Macro (pre-OS) on a Nikon, and the results are outstanding. Even with the D800 the ensamble is sharp enough at full aperture ("f4"), and a razor when stepped down. Almost no decay in the bokeh and absolutely no CA in any condition. But, but...

Awsome with 150mm Macro

No AF over f5.6 (Nikon); de facto only for Sigma lenses