Canon EOS Rebel T6s EF-S 18-135mm IS STM Lens Kit Instruction Manual - Page 202

Operating the Camera Using a Smartphone Terminating the Connection To terminate the connection, perform either of the following operations.  Tap [t] on the Camera Connect screen.  Set the camera's power to .  While connected, a picture cannot be taken even if the camera's shutter button is pressed.  In remote shooting, the AF speed may become slower.  Depending on the connection status, image display or shutter release may become slower than usual.  The connection will also be terminated if you set the power switch to , turn the Mode Dial, or open the card slot/battery compartment cover.  When saving RAW images to a smartphone, they are saved as JPEG images.  While connected, the camera's auto power off does not function.  While connected, disabling the smartphone's power saving function is recommended. W-28