Canon EF-S 60mm f/2.8 USM macro - Review / Test Report - Analysis
Lens Reviews - Canon EOS (APS-C)

Distortion

As expected for a fix-focal lens and especially for a macro lens the level of distortion is absolutely negligible.

The chart above has a real-world size of about 120x80cm.

Vignetting

Vignetting is a little bit of a mixed bag with this lens. At macro distances the lens delivers an exceptional performance here even at max. aperture. However, the situation isn't quite as rosy at infinity focus where the average edge shading exceeds 1EV which will be visible in many scenes. Stopping down helps to resolve the problem here with good results at f/4 and negligible vignetting from f/5.6 & up.

MTF (resolution)

Typical for most macro lenses the EF-S 60mm f/2.8 USM macro performed very good to excellent in the lab. The center performance is nothing short of superb scratching and probably exceeding the 8MP sensor limits at medium aperture settings. Even the borders (~70% off the center) as well as the extreme borders (~85% off the center) are only slightly worse with very good to excellent results. As such this lens is an exception to the rule - most reduced image-circle lenses perform much worse towards the borders. All lenses suffer from diffraction at very small aperture settings and the EF-S 60mm f/2.8 USM macro cannot be an exception here. At f/16 the results are still very impressive but at f/32 there isn't much image quality left so this setting should be generally avoided.

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)

Similar to most other fix-focal lenses chromatic aberrations (color shadows at harsh contrast transitions) are very low to low at all but very small aperture settings and usually nothing to worry about.




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