Fujifilm Fujinon XF 50 mm f/2 R WR review - Coma, astigmatism and bokeh

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Fujifilm Fujinon XF 50 mm f/2 R WR

28 March 2017

Arkadiusz Olech

7. Coma, astigmatism and bokeh

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The Fujinon 2/50 corrects the coma in a flawless fashion. The image of a diode in frame corners is a bit enlarged but it is not a pronounced effect. What’s more, it is diminishing when you pass to f/2.8.

X-T2, f/2.0, center	X-T2, f/2.0, corner

X-T2, f/2.8, center	X-T2, f/2.8, corner

Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, is negligible. With the lens tested on the Fujifilm X-E1 it amounted to 3.5% and on the X-T2 its level was only 2.9%. Both results are low and in perfect accordance with each other, within the margin of error.

Defocused light circles look nice. The light spread is very even, you only notice a slight rim on the very edge. Still mechanical vignetting is a problem – at the maximum relative aperture it truncates the circle in the frame corner in a very distinct way.