OCA - TAOP - Exercise 3

Exercise 3, Focus at Different Apertures;

This exercise is designed t oshow the effects different apertures have on the final image. As a rule of thumb, a large aperture such as f/1.8 will produce a very shallow depth of field, whereas a small aperture will produce a much deeper depth of field, rendering most, if not all, of a photographs detail sharp and in focus.

I chose a location near to some industrial works, showing a panel fence at an angle to give depth, as well as having another fence in the background to clearly show how a deeper depth of field would gradually render the fence in the background as sharp and in focus. In all images, the focus point was set just above the black sign on the fence.

F/2.8

This image was taken at F/2.8, the area I perceive as being in focus is the area immediately surrounding the black sign on the fence, extending a handful of panels in front of and behind the black sign. The fences in the background are also out of focus, especially the one in the very far background, and very hard to distinguish exactly what they are if otherwise unknown.

F/11

This image was taken at F/11, the depth of field is significantly deeper. The fence in the background is mostly sharp and in focus, you can also start to make out specific details in the background behind the fence, however most objects are still fairly blurred.

F/22

This image was shot at F/22, the depth of field in this image is significantly deeper than the F/2.8 version. the fence in the background is now sharp and clearly distinguishable, as well as all other background details, such as trees, rubble etc. This would be ideal for deep landscape scenes.