If you’re shooting sync sound with a 7D the DSLR slate app for the iPad is a BIG help! Go check it out.
The first slate designed specifically for the DSLR filmmaker, DSLR Slate provides unique inputs like ISO, Aperture, Shutter Speed, Lens, White Balance, and many more. The biggest standout feature is the “quick burst” mode which flashes not only the most common but ALL your data to the camera within about 2 seconds just before the A/V sync. This app was designed for the iPad but retains 100% functionality on the iPhone and iPod Touch.
These videos are walkthroughs of the universal app DSLR Slate 1.0.