Hi prata, thanks for your comments. It really looks vignetted. But I after checking the original larger version, it was just the clouds at the wrong place at the wrong time ;p
Anyway, i was just using the kit lens at the following setting. Possibly becos it is the kit lens, tats why it may contribute to the vig...
Shooting Mode
Aperture-Priority AE
Tv( Shutter Speed )
30
Av( Aperture Value )
16.0
Metering Mode
Evaluative Metering
Exposure Compensation
0
ISO Speed
100
Lens
18.0 - 55.0mm
Focal Length
18.0mm