A77 Settings: Distortion correction.

What's your setting for distortion, AUTO or OFF?

I found my camera is turned OFF, should I make this AUTO?

I use:
Sony 16-50
Sony 50 1.4
Sigma 105 M
Sigma 70-200 OS

Will those lens benefit from the AUTO settings?

I tried it using 50 1.4 and I didn't notice the difference, though I am just to pick Sigma lenses this coming week.

Thank you,
iHedo