Aperture – Aperture is how wide the hole in the back of the lens is, and it controls how much light is let in. It is measured in f-stops and the lower the number, the more light is let in.

Depth of Field – DOF is what’s in focus in front of or behind the main subject of the photo. Lower aperture (f2.8-f4) gives a shallow DOF (minimal focus) , higher aperture (f16-f22) gives a greater DOF (broader focus).

Focal Length – The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system’s optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.

Canon Camera Simulator

Shutter Speed – 1/10 Aperture – f6.7 ISO – 100

The slower shutter speed shows the propellers fast movement, the mid aperture blurs the background and keeps the main subject in greater focus, the lower ISO lowers the photos exposure.

Shutter Speed – 1/60 Aperture – f4 ISO – 400

The slower shutter speed shows the propellers movement, the low-mid aperture blurs the background and keeps the foreground in greater focus, the slightly higher ISO makes the photos brighter.

Uta Barth

Uta Barth employs depth of field and focus in her work by using a wide aperture and capture nothing of her photos in focus. Her work is about vision and perception and to make people really think about what their looking at, by ensuring nothing is in focus.

This photo (Fields #23) is part of a series called ‘Fields’ , a sequel to the series ‘Ground’ , both of which portraying blurred and empty foregrounds. These works also portray motion as the movement of the photos shows motion and movement