Subawider II 13-17mm Adapter (Wet Lens) w/Viewfinder for use with Nikonos Lens.

This is the Subawider II which is push on as opposed to the Subawider III which is screw-on, which makes it quicker and easier to switch between standard and super-wide shots. Continuing my pre-move clear-out, I have my Subawider II converter and viewfinder for sale.

eBay