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Tokina SZ 8mm f/2.8 Fish-Eye - Review / Test report - Analysis |
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Lens Reviews -
Fujifilm X
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Page 2 of 3
Distortion
Imatest wasn't able to produce a distortion figure for the lens ... but, hey, it's a fish-eye.
The sample image below may give you an impression about this though.
Vignetting
Sorry, no vignetting figures this time - there's no reliable way for us to measure this with such a lens.
There is some obvious vignetting at large apertures as you may spot in our sample image section though.
MTF (resolution)
The resolution characteristic of the Tokina SZ 8mm f/2.8 Fish-Eye is fairly decent. At large aperture settings, you will easily see softness
in the image corners (and the MTFs below don't show our usual "extreme corner" figures this time because that's almost impossible with such a lens).
The center quality is excellent, however, and if you stop down to f/8 you should be a happy camper even with respect to corner quality.
The centering quality of the tested sample was good.
Please note that the MTF results are not directly comparable across the different systems!
Below is a simplified summary of the formal findings. The chart shows line widths
per picture height (LW/PH) which can be taken as a measure for sharpness.
If you want to know more about the MTF50 figures you may check out the corresponding
Imatest Explanations
Chromatic Aberrations (CAs)
The biggest weakness of the lens is lateral CAs. At 5px on average at the image borders, they are massive.
And without a built-in correction profile, you have to correct this in post-processing. Most RAW converters can still do it without drama though.
There's also quite a bit of purple fringing. It's more difficult to correct but at least Photoshop ACR was able to do it with manual guidance.
Flare
Flare is pretty well controlled. This doesn't mean that it's impossible to produce ghostings but you can drive all lenses into producing some.
Below is a worst case scenario.
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