LensTip.com

Lens review

Mitakon Speedmaster 50 mm f/0.95

22 December 2017
Arkadiusz Olech

7. Coma, astigmatism and bokeh

When it comes to coma and other aberrations which deform point-like light images in the frame corners, the Mitakon is an excellent example how you shouldn’t correct them. Diode points are deformed already in the corners of APS-C and, what’s the worst, the deformation remains visible even on stopping down the lens by 1 EV. The situation in the corners of full frame is simply outrageous. Catastrophic resolution results on the edge of the frame stop being so mysterious when you look at those hugely deformed images of diode.

Center, f/0.95 Corner APS-C, f/0.95 Corner FF, f/0.95
Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh
Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 3.3% so, contrary to coma, wasn’t bothersome. In fact such a result should be called very good.


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The out of focus areas of the tested lens look very well too. The circles don’t feature any local extremes and even the rim, appearing on stopping down, is not especially intensive. A significant truncation of circles in the frame corners, a result of strong mechanical vignetting, seem to be their only flaw.

Center, f/0.95 Corner APS-C, f/0.95 Corner FF, f/0.95
Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh
Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh Mitakon Speedmaster 50 mm f/0.95 - Coma, astigmatism and bokeh