The Filter Adapter for Canon G1 X by Canon is
a 58mm lens filter adapter specifically made to utilize lens filters on
the Canon G1 X. The adapter screws directly onto the lens barrel ring
and is designed to move with the lens while zooming in and out. This
provides filter coverage throughout the zoom range and prevents
vignetting at the wide-angle end of the zoom.
It is dedicated for use with the Canon G1 X and will support any kind of 58mm filter