Fujifilm Fujinon XF 8 mm f/3.5 R WR
4. Image resolution
Let's remind here that the best fixed focal length Fujifilm X lenses, tested that way, are able to reach as high as 80 lpmm and the decency level is set near 44-45 lpmm. The resolution record for this sensor amounts to about 85 lpmm and higher, with the best result belonging to the Fujinon XF 56 mm f/1.2 R WR (92.8 ±1.1 lpmm) and the Fujinon XF 18 mm f/1.4 R WR (93.5 ±0.9 lpmm).
Let's check how the Fujinon XF 8 mm f/3.5 R WR compares – its results in the frame centre and on the edges presents a graph below.
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We should say at once that in this case you can't expect any records when it comes to resolution values. Why? On the 24-Mpix sensor of the X-T2 the records are achieved by fast 'primes' near the f/2.8 aperture and the Fujinon XF 8 mm f/3.5 R WR is a slower instrument. Near its maximum relative aperture it still experiences the influence of optical aberrations and its performance can improve only on stopping down.
Still one glance at the graph presented above and you know that the tested lens doesn't have to be ashamed of its performance. In the frame centre you get a very high value of almost 73 lpmm already at the maximum relative aperture and it increases to 76 lpmm on slight stopping down the aperture to f/4.0. Further resolution increases are almost impossible – on a more significant stopping down the lens is already limited by diffraction.
When it comes to resolution on the edge of the frame we have no reservations whatsoever. Already at the maximum relative apertue you deal with results exceeding 56 lpmm and near the f/5.6 aperture the lens is able to reach at least 60 lpmm.
To sum up you can say that the new Fujifilm product is a small, shapely, lightweight lens; it offers you an ultra wide angle of view along with very good image quality in the frame centre without any slip-ups on the edge of the frame - a rare situation indeed. I admit this part of the test the lens passed with flying colours.
At the end of this chapter, traditionally, we present crops taken from photos of our resolution testing chart which were saved in the JPEG format along with RAW files, used for the analysis above.
| Fujifilm X-T2, JPEG, f/3.5 |
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| Fujifilm X-T2, JPEG, f/4.0 |
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