Widest Focal Length on SGBlade+Ex-1

[Armstrongfilms]

its probably been mentioned, but im lazy...Whats the widest you can go on a prime lens on the sgblade before obvious vignette or edge focus is viewable? stills would help, if you got em'

bout 2 click the shopping cart before i have 2 wait til may 2 get mine!
thanks