Canon EOS 3 User Manual (en)

In this mode, you set the desired shutter speed and the camera sets the
aperture automatically to suit the subject brightness.
A fast shutter speed can freeze motion, and a slow shutter speed can
achieve a blurred effect.
While pressing the <
button, turn the <
> dial until Tv
appears on the LCD panel.
1. Shutter Speed-Priority AE (Tv): 
You Set the Shutter Speed
Tv is an abbreviation for Time value.
With a fast shutter speed
With a slow shutter speed
 06. C836-E (61~)  28-01-2003  11:48  Pagina 62