Hi all, I have a canon G7 with the regular OEM housing (WP-DC11) and was checking out the range of dyron wide angles to use with this combination. I have long been searching for a wide angle option to use with my G7 underwater without the expense of having to buy a new housing or camera. I have seen claims on some websites selling the M67 adapter for the canon housings that it will not vignette when used with the dyron DY.67WA15 and DY.67WA20 wide angle adapters. I am particularly interested in the DY.67WA15 X0.3 wide angle lens as it hopefully would be slightly wider. Is this claim true, or do you have to zoom in too much to eliminate vignette that it defeats the purpose of having a wide angle lens? Also, does anyone have any photos to back this up?