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Lens review

Mitakon Speedmaster 85 mm f/1.2

10 July 2015
Arkadiusz Olech

7. Coma, astigmatism and bokeh

At the maximum relative aperture the coma is visible even in the corner of the APS-C/DX sensor. In the full frame corner it is already distinct but still its level cannot be called very high. What’s interesting, the Canon 1.2/85 II didn’t fare much better in this category and even the slower and noticeably more expensive Otus didn’t manage to avoid coma in corners of full frame.

Center, f/1.2 Corner APS-C, f/1.2 Corner FF, f/1.2
Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh
Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh


We have no reservations concerning the astigmatism correction. An average difference between horizontal and vertical MTF50 function values amounted to 9.5% which is perhaps not a very low result but doesn’t make us worry. Still the rivals fared a tad better here (e.g. the Canon – 3.6%, the Otus – 5%).


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The appearance of blurry areas can be described only in superlatives for a change. Defocused circles have a very even light spread; they look even better than those of the Otus which still had some traces of ‘onion ring’ bokeh. However once again the size of the mount becomes a problem because the rings we got in the frame corners are not only shaped like teardrops but also their bottoms are truncated.

Center, f/1.2 Corner APS-C, f/1.2 Corner FF, f/1.2
Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh
Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh Mitakon Speedmaster 85 mm f/1.2 - Coma, astigmatism and bokeh