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Lens review

Canon EF 70-300 mm f/4-5.6 L IS USM

28 October 2011
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Arkadiusz Olech

7. Coma, astigmatism and bokeh

When it comes to coma correction, the lens should definitely be praised. That aberration is low not only in the corner of the APS-C sensor but also in the corner of full frame, where its influence on the image quality is minimal.

Canon EF 70-300 mm f/4-5.6 L IS USM - Coma, astigmatism and bokeh

The astigmatism is corrected equally well. The average difference between horizontal and vertical MTF50 function values amounted to just 3.7% which is a very good result.


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Below we also present photos of defocused diode image, taken at both ends of the focal spectrum.

Canon EF 70-300 mm f/4-5.6 L IS USM - Coma, astigmatism and bokeh

Canon EF 70-300 mm f/4-5.6 L IS USM - Coma, astigmatism and bokeh



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