Up for sale is a used Zen 100mm dome port for Nauticam N85 housings. I used this with the Olympus 8mm fisheye with a 20mm extension, which worked great. It's in fine, working condition with clean glass, marks on the hood and exterior. This may be used with the Panasonic 8mm fisheye without extension. New $999. Selling here for $450, which includes PayPal fees, shipping and insurance via USPS to USA. More for international shipping, your cost. You are responsible for VAT or your country's fees.