Canon EF 200mm f/2.8 L USM II - APS-C Review / Test Report - Analysis
Lens Reviews - Canon EOS (APS-C)

Distortion

As expected for a fix-focal lens the level of distortion 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 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

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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