Definition Of aperture
an opening, hole, or gap.
the bell ropes passed through apertures in the ceiling
Example Of aperture
A cover slides down to reveal a small keyboard at the front, and uncovers the camera aperture at the back.
A photoelectronic detector measures the light passing through the aperture .
a refracting telescope with an aperture of 3 inches
A wide aperture will take care of the background but I don't want any blurring of grass waving in the foreground.
As before, the images were taken with a constant focal length, lighting, aperture , and shutter speed.