Sigma 18-50mm F2.8 DC DN Review

November 25, 2021 | Mark Goldstein | Rating star Rating star Rating star Rating star Half rating star

Sharpness at 18mm

For this test, the Sigma 18-50mm F2.8 DC DN Contemporary lens was attached to a Sony Alpha A6000 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

The full frame at 18mm

Center sharpness is outstanding between f/2.8 and f/11. At f/16 and especially f/22 sharpness drops off due to diffraction.

Edge sharpness isn't quite as good as in the centre, with the sharpest results between f/5.6 and f/11.

Aperture Centre Crop Edge Crop
f/2.8 f2.8.jpg f3.5.jpg
f/4 f4.jpg f4.jpg
f/5.6 f5_6.jpg f5_6.jpg
f/8 f8.jpg f8.jpg
f/11 f11.jpg f11.jpg
f/16 f16.jpg f16.jpg
f/22 f22.jpg f22.jpg