Samyang AF 75mm f/1.8 FE Review - Performance

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Samyang AF 75mm f/1.8 FE Performance

Central sharpness is simply outstanding from f/1.8 all the way through to f/5.6, excellent from f/8 to f/16 and still very good at f/22. That is one of the best results I have ever measured.

The edges are excellent from f/1.8 through to f/11, very good at f/16 and still good at f/22.


Samyang AF 75mm 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 very well under control centrally. At the edges we can measure some CA, especially as we stop down, but of course this is reasonable anyway and can always be further corrected in software if required.


Samyang AF 75mm 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.


Pincushion distortion measures at +0.19%, almost perfectly rectilinear, and is unlikely to be a problem.

Bokeh, the smooth gradation of the out of focus areas in an image, is especially important for a potential portrait lens and this does not disappoint. It is really smooth and lovely effects are possible. Whether a subtle background blur for a portrait or for a flower study, the results are delightful.

Flare is virtually non-existent and even in the most challenging situations there is no obvious loss of contrast, nor are there any artefacts.

Vignetting is modest and perfectly acceptable. In visual terms it cannot really be seen on normal subject matter.

The vignetting results:

Aperture Vignetting
f/1.8 -1.5 stops
f/2 -1.4
f/2.8 -1.2
f/4 -1.2
f/5.6 -1.1
f/8 -1
f/11 -1
f/16 -0.9
f/22 -0.9

Samyang AF 75mm f/1.8 FE Sample Photos


Samyang AF 75mm f/1.8 FE Aperture range

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