Canon EOS Rebel T4i 18-135mm IS STM Lens Kit Instruction Manual page 102

i Continuous Shooting
The maximum continuous shooting speed of approx. 5 shots per second
is achieved* with a shutter speed of 1/500 sec. or faster and at the
maximum aperture (differs depending on the lens). The continuous
shooting speed may decrease due to shutter speed, aperture, subject
conditions, brightness, lens, flash use, etc.
* With the following lenses, 5 shots per second is achieved with One-
Shot AF and the Image Stabilizer turned off: EF300mm f/4L IS USM,
EF28-135mm f/3.5-5.6 IS USM, EF75-300mm f/4-5.6 IS USM, and
EF100-400mm f/4.5-5.6L IS USM.
In AI Servo AF operation, the continuous shooting speed may become
slightly slower depending on the subject and the lens used.
When the battery level is low, the continuous shooting speed will become
slightly slower.
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