The C1, C3, and the Shutter button don't work in the still image mode
IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.
If the C1 button (Iris), C3 button (ISO), and bottom side of the control wheel (Shutter) don't work in the still image mode is because the default settings for the custom key settings are functions for the Movie mode, which are not available in the still image mode.
Change the custom key settings for the still image mode to your desired functions.
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