This close-up diopter is the world famous Woody's diopter. It has great optics and give about a 20% magnification over your existing macro lens. It's a wet diopter, meaning it can be easily put on or taken off the front of your macro port while underwater. Just remember to "swish" out any air bubbles before attaching!
It's in great condition and has no marks on the lens. These diopters come in a variety of sizes. This one is made for a 110mm outside diameter port like the SeaCam line of flat ports.
It cost $90 new, will take $60.
