The glass lens port has been optimized for full use of the camera's zoom range.
The front of the lens port is 67mm threaded for the direct attachment of external wide angle and macro lenses. This port is as close to the camera's lens as possible for the best image quality and minimal vignetting (dark shadows in the corners of the image) with external wet lenses. Vignetting can be eliminated by cropping the photo in post-production. The INON UWL-H100 exhibits the least vignetting and best clarity with this model among popular wet lenses currently available on the market.