How Aperture Changes What Appears Sharp in a Photo
How Aperture Changes What Appears Sharp in a Photo
The aperture affects both the amount of light and the range of distances that appear acceptably sharp.
Opening the aperture can make the background softer when the subject is close. Closing it can increase the range of sharp distances and require a slower shutter speed or more sensor gain.
The exact result depends on subject distance, focal length and viewing size. Closing the aperture very far can also soften fine detail through diffraction.
Photograph the same subject at several apertures from a fixed position. Compare focus on the subject and separation from the background before choosing a setting.
