Sharpness Cont... 2

Sharpness at 35mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Canon EF 24-70mm f/4L IS USM lens was attached to a Canon 6D body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frame at 35mm

Center sharpness is excellent wide open at f/4 and nothing short of outstanding between f/5.6 and f/8. At f/11 - f/22 sharpness is beginning to drop-off due to diffraction, but is still commendably high. Edge sharpness is best between f/8-f/11.

Aperture	Centre Crop	Edge Crop
f/4
f/5.6
f/8
f/11
f/16
f/22

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wide-angle, lens, travel, canon, wide angle, telephoto, portrait, image stabilisation, journalism, journalists, macro, photojournalist, wedding, ef, f4, IS, 24-70mm, 24-70, 4-stop, usm, Canon EF 24-70mm f4L IS USM Review, 24-70 mm, reportage, 0.7x