Canon RF 100-400mm F5.6-8 IS USM Review
November 10, 2021
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Mark Goldstein
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Ease
of Use -
Sample
Images -
Lens
Specs -
Rating &
Conclusion -
Main
Rivals -
Review
Roundup - Comment
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Moreā¦
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Sharpness at 400mm
For this test, the Canon RF 100-400mm F5.6-8 IS USM lens was attached to a Canon EOS R6 body, which was in turn mounted to a sturdy tripod. Exposure delay mode was activated. Tonal and colour variance across the crops are due to change in natural light during the session.
![The full frame](/images/photographyblog/1x1-grey.gif)
The full frame at 400mm
Center and edge sharpness are both very good wide open at f/8 and excellent between f/11 and f/22. At f/32 sharpness across the frame is beginning to drop-off a little due to diffraction, but is still commendably high.
Aperture | Centre Crop | Edge Crop |
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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f/45 | ![]() |
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-
Ease
of Use -
Sample
Images -
Lens
Specs -
Rating &
Conclusion -
Main
Rivals -
Review
Roundup - Comment