To adjust the shutter speed of the my Cannon 500D the mode dial is adjusted to TV. However when the camera is set in TV mode it automatically adjust the aperture, this also applies when you use the AV setting as the camera will automatically set the shutter speed and allow you to alter the aperture.
To set both the aperture and shutter speed yourself it is best to use M.
The aperture determines how much light passses through the lense and onto the sensor and the shutter speed governs the amount of time that the light is allowed to do so.
By choosing a quick shutter speed eg 1/60 sec moving water would appear motionless. To make the water look like it is flowing you would use a longer shutter speed eg. 8 secs. Although whilst using a longer shutter speed a tripod is necessary.
| Subject | Shutter Speed |
| Landscape | 60 |
| Portrait | 125 |
| Children | 250 |
| Animals | 500 |
| Sports | 1000 |
| Race Cars | 4000 |
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