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Samyang AF 24mm f/1.8 FE Review - Performance

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Samyang AF 24mm f/1.8 FE Performance

Central sharpness is excellent at f/1.8, outstanding from f/2 to f/4, excellent from f/5.6 to f/11 and very good at f/16 and f/22. The edges are excellent from f/1.8 all the way through to f/8, very good at f/11 and f/16 and good at f/22. This is a superb performance and leaves little to be desired.



Samyang AF 24mm f/1.8 FE MTF Charts

How to read our MTF charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges.

The scale on the left side is an indication of actual image resolution and sharpness as LW/PH and is described in detail above. The taller the column, the better the lens performance.

For this review, the lens was tested on a Sony Alpha A7R III using Imatest. Want to know more about how we review lenses?


CA (Chromatic Aberration) is present both centrally and at the edges but is not generally visible in most images. It may be that we would wish to switch in corrections for astrophotography and other highly critical work, but the performance is generally sound and fringing is not noticeable on most subject matter.


Samyang AF 24mm f/1.8 FE Chromatic Aberration Charts

How to read our CA charts

Chromatic aberration (CA) is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.

For this review, the lens was tested on a Sony Alpha A7R III using Imatest.


Barrel distortion measures at -2.09%, what we expect from ultra-wide lenses, but really quite acceptable as it stands. If necessary, corrections can be switched on in camera or adjusted in software.

Bokeh, the smooth gradation of the out of focus areas in an image, is not the main consideration for much of the work done with a 24mm lens, but here the circular aperture and lens design both contribute to an excellent end result. The bokeh is smooth and pleasant and provides an attractive backdrop to the main subject.

Flare is virtually non-existent and even in the most challenging situations there is no obvious loss of contrast, nor are there any artefacts. Samyang's UMC coating is clearly highly effective.

Vignetting is there to be seen, but not excessive and as always with the caveat that some corner darkening can be a benefit for wide angle lenses. If it needs to be corrected, then in camera adjustments or software are there to do the job.

The vignetting results:

Aperture Vignetting
f/1.8 -2.3 stops
f/2 -1.8
f/2.8 -1.5
f/4 -1.5
f/5.6 -1.5
f/8 -1.5
f/11 -1.5
f/16 -1.5
f/22 -1.5

Samyang AF 24mm f/1.8 FE Sample Photos


Samyang AF 24mm f/1.8 FE Aperture range

*We will be adding more images as we take them. You can view additional images in the Equipment Database, where you can add your own review, photos and product ratings.

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