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Lens review

Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR

15 December 2019
Arkadiusz Olech

7. Coma, astigmatism and bokeh

Coma and other higher degree optical aberrations deform images of a diode in the frame corners but their influence is not strong. What's more, here the Fujinon seems to fare better than the rest of its competitors which showed a tad more pronounced deformations or even very distinct ones (e.g. the Nikkor).

X-T2, 16 mm, f/4.0, Center X-T2, 16 mm, f/4.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh
X-T2, 30 mm, f/4.0, Center X-T2, 30 mm, f/4.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh
X-T2, 50 mm, f/4.0, Center X-T2, 50 mm, f/4.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh
X-T2, 80 mm, f/4.0, Center X-T2, 80 mm, f/4.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh


When it comes to astigmatism understood as an average difference between horizontal and vertical MTF50 function values, it amounted to 8.6%. It is a moderate result which shouldn't worry you. Still you have to remember you deal here with an average value, computed for all focal lengths and areas close to the maximum relative aperture. If you start to analyse it in more detail you find out that 80 mm contributed the most - the astigmatism at 80 mm reaches as much as 17.7%, which is quite a lot. It means astigmatism is a dominant factor, contributing to the worsening of image quality at that focal length. What's interesting, at 50 mm that aberration is already reduced to a very low value, that of just 4.9%.


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Out-of-focus images, provided by the Fujinon 16-80 mm, are hardly impressive. Circles have ligher rims and distinct concentric rings (as many as four aspherical elements make themselves felt here) and their inner structure is hardly inviting. If you wanted to praise anything in this category you can focus on a small influence of mechanical vignetting which disappears completely already on stopping down the aperture by 1 EV.

X-T2, 80 mm, f/4.0, Center X-T2, 80 mm, f/4.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh
X-T2, 80 mm, f/5.6, Center X-T2, 80 mm, f/5.6, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh
X-T2, 80 mm, f/8.0, Center X-T2, 80 mm, f/8.0, Corner
Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh Fujifilm Fujinon XF 16-80 mm f/4 R OIS WR - Coma, astigmatism and bokeh