Especially suited to close focus wide-angle photography, the IKELITE DL COMPACT 8 INCH DOME PORT EXTENDED was originally designed for use with the Tokina 10-17mm Fisheye lens when used with compatible Ikelite 200DL and 50DL housings. The port can be attached directly to Dry Lock (DL) housings or combined with DL extensions. Optional equipment may be required. Featuring an optical-grade acrylic dome and an acetyl frame, it is smaller than Ikelite's standard 8" dome port and therefore more convenient for travel.