Fujifilm Fujinon XF 23 mm f/1.4 R LM WR
4. Image resolution
Let's remind here that the best Fujifilm X system lenses, tested that way, are able to reach results of 80 lpmm and the decency level is set near 44-45 lpmm. Record values for that sensor amount to 85 lpmm and higher. So far, the best resolution results have been achieved by the Viltrox AF 23 mm f/1.4 XF (85.3 ±0.9 lpmm) and the Fujinon XF 18 mm f/1.4 R WR (93.5 ±0.9 lpmm).
Let's check how the results of the Fujinon XF 23 mm f/1.4 R LM WR compare in the frame centre and on the edge – an appropriate graph you can find below.
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The performance in the frame centre is really great. Already at the maximum relative aperture you get a very high result, reaching almost 70 lpmm. Stopping down the lens that result is improved – by f/4.0 you see a very respectful level of over 82 lpmm.
The performance on the edge can also be described in superlatives only, especially if you take into account the angle of view and very good aperture fastness. Images are of very good quality up from the maximum relative aperture where MTFs exceed 57 lpmm. The best results you see by f/2.8 and f/4.0, where resolution reaches near 70 lpmm.
It's interesting to compare the Fujinon, tested here, and the Viltrox AF 23 mm f/1.4 XF, a rival lens with exactly the same parameters. After stopping down the Viltrox managed to get one of the best result in the history of our tests based on the Fujifilm X-T2, reaching over 85 lpmm, 3 lpmm better than the best result of the Fujinon. Still, the Viltrox focused just on records, neglecting the performance near the maximum relative aperture and on the edge of the frame. Overall the performance of the Fujinon I like better – even if its maximum result, remaining brilliant all the same, is a tad lower, the lens fares very well at the maximum relative aperture and on the edge of the frame. A round of applause!
Traditionally, at the end of this chapter we present crops taken out of images of our resolution testing chart, saved as JPEG files along RAW files which were used for the analysis above.
| Fujifilm X-T2, JPEG, f/1.4 |
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| Fujifilm X-T2, JPEG, f/2.8 |
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