Canon EOS Rebel T3i 18-135mm IS Lens Kit EOS REBEL T3i / EOS 600D Instruction - Page 90

D Using the Built-in Flash In indoors, low light, or backlit conditions in daylight, just raise the builtin flash and press the shutter button to take flash pictures. In the mode, the shutter speed (1/60 sec. - 1/200 sec.) will be set automatically to prevent camera shake. 1 Press the button. In Creative Zone modes, you can press the button anytime to take flash pictures. While the flash is recycling, "DbuSY" is displayed in the viewfinder, and [BUSYD] is displayed on the LCD monitor. 2 Press the shutter button halfway. In the bottom left of the viewfinder, check that the icon is lit. 3 Take the picture. When focus is achieved and you press the shutter button completely, the flash will fire for the picture. Effective Flash Range [Approx. in meters/feet] ISO speed (p.79) EF-S18-55mm f/3.5-5.6 IS II EF-S18-135mm f/3.5-5.6 IS Wide Angle Telephoto 100 1 - 3.7 / 3.3 - 12.1 1 - 2.3 / 3.3 - 7.5 200 1 - 5.3 / 3.3 - 17.4 1 - 3.3 / 3.3 - 10.8 400/AUTO* 1 - 7.4 / 3.3 - 24.3 1 - 4.6 / 3.3 - 15.1 800 1 - 10.5 / 3.3 - 34.4 1 - 6.6 / 3.3 - 21.7 1600 1 - 14.9 / 3.3 - 48.9 1 - 9.3 / 3.3 - 30.5 3200 1 - 21.0 / 3.3 - 68.9 1 - 13.1 / 3.3 - 43.0 6400 1 - 29.7 / 3.3 - 97.4 1 - 18.6 / 3.3 - 61.0 H: 12800 1 - 42.0 / 3.3 - 137.8 1 - 26.3 / 3.3 - 86.3 * For fill flash, the ISO speed might be set lower than ISO 400. 90