Exercise 3 – Focus as different apertures

This exercise was to show how the aperture effects focus.  I took two images one at my widest lens aperture F2.8 (fig 1) and one at my largest lens aperture F5.6 (fig 2).  I have marked where my focus point was and drawn round the sharpest parts of each image.

 Fig 1

F2.8, ISO200, 1/400's 200mm

Fig 2

F5.6, ISO200, 1/100's, 205mm

There was a bit of a breeze which may have had an effect as the flags were blowing slightly.  Also the effect would have been clearer if I had a bigger difference between apertures, but you get the general idea of what the exercise aim was.