Photography 1: The Art of Photography

Project Focus
Exercise: Focus at different apertures.

I took 3 photographs using the same lens.  All three images were taken at a focus point of 2m.  For the first image I used the widest aperture for the lens, F2.8.  For the second image I used the mid-point of the lens's aperture scale, F9. The aperture for the third image was the smallest available for the lens, F32.

Aperture F2.8

Aperture F9

Aperture F32

The apparent depth of field for each image is indicated by the black lines on each image.  It is clear from these 3 images that the depth of field is smallest at the widest aperture and greatest at the smallest aperture.

What have I learned from this exercise ?

The limits of sharpness, or depth of field varies with aperture.  The smaller the aperture, the greater the depth of field.