Ikelite 6441.16 Yellow Barrier Fluorescence Filter for 3.9 diameter 23D Its blade is treated with

Its blade is treated with the PVD system with a sharp and micro serrated edge

Its anatomical skirt has no internal border

this kit will help you get the most out of your underwater camera

The new silicone material effectively minimizes fogging

it emits an audible alarm and flashes red to warn you immediately to surface before it's too late

Ikelite 6441.16 Yellow Barrier Fluorescence Filter for 3.9 diameter 23D Its blade is treated withTo see this underwater, you'll need a light with a dichroic "excitation filter" attached AND a yellow "barrier filter" on your mask and camera system. What you'll generally see is a glow emitted from a variety of corals and animals, mostly in greens, blues, and reds. You may find two of the same type of coralsone which fluoresces, and one which doesn't. Dive your favorite spots in a different light and see what you've been missing! Fluorescence is