Shutter Speed

IOS 100 f/5.6 1/2000 sec

The 3 camera settings that comprise the Exposure Triangle are Aperture, Shutter speed and ISO.

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/22, f/20, f/16,f/10, f/6.3, f/5.6, f/4.0,

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

IOS 100 f/4.0 1/30 sec

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

Examples of Shutter speeds (not in order) are ⅛”., ½, 1”, 1/30,1/60/, 1/125, 1/250, 1/500, 1/1000, 1/2000, 1/4000, 

IOS 100 f/18 8.0 sec

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.

IOS 100 f/5.6 1/1250sec

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