Page 93 - (DK) Advanced Photography Guide

FO CUSING 91

SHOOT AND REVIEW
Check the sharpness of DIFFRACTION
the shot by zooming into the
image on the camera’s LCD The smallest lens apertures produce
screen. Pay careful attention a visual effect called diffraction. It is
to the areas closest to the caused by the reduction in optical
camera and check that the resolution of a lens and results in
focusing is accurate. Try a noticeable softening of images.
adjusting the aperture setting The size of the camera sensor also
if you want more or less of determines how quickly diffraction
the image to be sharp. becomes noticeable: smaller sensors
are more prone to diffraction. For
this reason, the minimum aperture
range on compact cameras is often
restricted to f/8 or f/11.

THE RESULT CAMERA SETTINGS
Front-to-back sharpness is important for landscape subjects, as it helps ISO
to convey a sense of depth and perspective. The hyperfocal distance A f/10 1/800 200 AW B
was the rock just to the right of the image centre. SEC

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