Shutter speed

ISO 200 29mm f/22 10.0sec

The 3 camera settings that comprise the Exposure Triangle are shutter speed, aperture & ISO.

ISO 6400 23mm f/8.0 1/4000sec

On the back monitor of our Canon DSLR cameras, the aperture setting is displayed with “F” followed by a number.  

Apertures (from smallest openings to largest openings) are typically numbers f/16, f/11, f/8.0, f/5.6, f/4.0, f/2.8, f/2.0, f/1.4

The shutter speed settings are shown on the top left on the back monitor. 

Expressed as fractions of a second, the shortest or highest shutter speed on our cameras are 1/4000 seconds and the longest or slowest shutter speed is 30 seconds.

ISO 100 18mm f/5.6 1/25sec

The third setting ISO controls the camera’s sensitivity to light. 

This setting goes from 100,200,400,800, 1600, 3200, 6400 on our cameras.

To center the meter on our cameras, we can either  change the ISO, Aperture or the shutter speed.