AquaTech PD-65 Dome Lens Port for Canon 15mm f2.8 - also suits other similar size lens

The technical details behind this lens port
Go on a water adventure and have fun while using your Aquatech P-65 Lens Port. It is a 6" dome, scratch-resistant front acrylic element so you can shoot clearly underwater. This lens port is made with acrylic element and Delphin base and is mechanically sealed. It is easy to install and remove and is interchangeable with Elite and Delphin Water Housing models. Moreover, this screw-on is lens supports Canon 15mm f/2.8, Sigma 8mm f/3.5 circular fisheye, Sigma 15 mm F/2.8, Canon 14mm f/2.8 (requires 30mm ext ring), Nikon 14-24mm f/2.8 (requires 30mm ext ring), Tokina 10-17mm f3.5-4.5 No Hood, and Tokina 11-16mm f/2.8 (requires 30mm ext ring). It measures 161mm x 59mm (DxL) and weighs 295g.
Key Features

Mechanically Sealed without Adhesives
Acrylic Flat Front Element
Screw-On Mount
Designed for Shallow Water & Surface Use
Top three reasons we think you will love this lens port

Easy shooting in the water
Impressive sealing
Scratch-resistant front element