Canon RF 70-200mm F4L IS USM Review
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Sharpness at 200mm
Our sharpness tests are carried out by photographing a real-world subject rather than a test chart. The Canon RF 70-200mm F4L IS USM was attached to a Canon EOS R6 camera, which in turn was mounted on a sturdy tripod. Self-timer mode was activated to steady the camera completely. Any slight tonal changes you may see across the crops are a result of slight changes in natural light during the shooting session.
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The full frame at 200mm
At both the centre and the edges of the image, sharpness is excellent even at the maximum aperture of f/4. It maintains that level of sharpness until f/16, where it remains excellent but is ever-so-slightly softer due to diffraction. It gets softer again at f/22, with the worse results seen at f/32.
Aperture | Centre Crop | Edge Crop |
f/4 | ![]() |
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f/5.6 | ![]() |
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f/8 | ![]() |
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f/11 | ![]() |
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f/16 | ![]() |
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f/22 | ![]() |
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f/32 | ![]() |
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