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Canon EF 200mm f/2.8 L USM II - APS-C Review / Test Report - Analysis |
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Lens Reviews -
Canon EOS (APS-C)
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Page 2 of 3
Distortions
As expected for a fix-focal lens the level of distortions is quite negligible. The situation
remains about the same when attaching an EF 1.4x II converter.
200mm:
The chart above has a real-world size of about 120x80cm.
Vignetting
On the EOS 350D with its reduced format (APS-C) the (full format) lens exhibits slight vignetting
at f/2.8 which shouldn't be much of a problem even at wide-open aperture. One stop down it is
negligible even by lab standards.
MTF (resolution)
The EF 200mm f/2.8 L USM II (2nd sample) exhibited a very decent performance in the MTF lab.
At wide-open aperture the resolution is very good and already quite even across the frame.
The sweet spot is reached around f/5.6 with an excellent center to border quality.
When attaching a Canon EF 1.4x II converter the quality decreases slightly with good (wide-open)
to very-good (medium apertures) ratings - this is based on the 1st tested sample of the lens
which performed slightly worse.
Below is a simplified summary of the formal findings. The chart shows in line widths per picture height (LW/PH)
which can be taken as a measure for sharpness. If you want to know more about it you may check out the corresponding
Imatest Explanations.
The quality of the bokeh (the fore-/background blur at large apertures) is very smooth. The lens
isn't overly prone to flare but using the hood is still a good idea especially with streaking light.
Chromatic Aberrations (CAs)
Similar to most other fix-focal lenses chromatic aberrations (color shadows at harsh contrast transitions) are
extremely low and nothing to worry about.
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