Custom Functions on the Canon 70D let you specify with fine-grain control how your camera operates. Exposure custom functions focus on adjustments related your camera’s exposure settings.
These custom functions are found in the C.Fn I: Exposure menu in the second-to-last tab in the settings menu of the camera. There are six customizable functions. Let’s cover each of them individually:
- Page 1 gives two options to adjust the increments at which exposure is adjusted in the camera: 1/3 stop increments or 1/2 stop increments.
- Page 2 lets you set the increment adjustment for your ISO speed: third stop or half stop increments.
- Page 3: Bracketing auto cancel can be set to off or on. When set to off, the camera will reset AEB and white balance bracketing when the camera is switched off. When set to on, the camera will resume bracketing even through a camera restart.
- Page 4 gives three options for the order of bracketing sequences. The options are read left-to-right: the default (option 0) selection will start the bracket by taking the neutral photo, then underexposure, and finally overexposure. Option 2 starts with the underexposure, then neutral, then overexposure. Finally, option 3 begins with overexposure, neutral exposure, then underexposure.
- Page 5 lets you set the number of shots taken in a bracket: 2, 3, 5, or 7 shots.
- Finally, page 6 lets you change which settings the camera will automatically adjust (despite a manual setting) if autoexposure cannot obtain a balanced exposure. The default option is set to disabled.
- Option 1 allows the camera to adjust shutter speed and aperture in Shutter Priority (Tv) and Aperture Priority (Av) shooting modes. Option 2 will allow the camera to adjust ISO speed in Av, Tv, and Program (P) shooting modes.