The edges of the image at the wide angle side of the zoom appear to be distorted.

When shooting with the zoom lens set at a wide-angle, the edges of the image may be distorted, depending on the subject.
If the distortion is a concern, it is recommended that you shoot with the digital or optical zoom from a position slightly away from the subject, or compose the picture with the subject in the centre.

NOTE: A third party editing software can be used to fix the distortion on the image.

Example a shot at wide-angle

Photographing from a position further away from the subject