Here are my settings FWIW.
Resolution:640x480 pixels
Compression:25 [0..100]
Rotate image: 0 degrees
White balance: auto
Color level: 86 [0..100]
Brightness: 58 [0..100]
Contrast: 42 [0..100]
Exposure control: automatic
DC-Iris: Enabled
The DC-Iris should be set to Disabled when adjusting the focus. Set to enabled at all other times (unless using a lens without a DC-Iris.)
To make focus adjustment easier, open a new image window by clicking the View button.
Low Light Behavior
Priority: Prioritize image quality
Max exposure time:2 s
Max gain:31 dB