Focusing

Tablet: WayteQ xTAB-70 Android 4.0 tablet rooted Software: DSLR Controller Beta Camera: Canon EOS 550D + Canon EF-S 18-135mm lens Usage: Set the lens to AF Use the DSLR Controller to focus to point A, long press A in DSLR Controller Use the DSLR Controller to focus to point B, long press B in DSLR Controller Now when you press A or B, the lens will shift to the predetermined focus position. You can use fast or slow racking.