Sea & Sea Compact Macro Port M 67

The Sea & Sea Compact Macro Port is used on Nikon AF-S Micro-Nikkor 60mm F2.8G ED, Nikon Ai AF Micro-Nikkor 60mm F2.8D, Cannon EF 50mm F2.5 Compact Macro + Cannon Life Size Converter EF, Cannon EF 100mm F2.8 Macro USM EF 28-80mm F3.5-5.6 USM III, IV, V, Cannon EF28-90mm, Sigma Macro 105mm F2.8 EX DG, Sigma AF 90mm Macro F2.8 EN and Sigma Mini Zoom Macro EF 28-80mm HF 3.5-5.6 Aspherical HF Lenses. The Port is made from corrosion resistant anodized aluminum (alumite coating) with tempered glass front lens. The Port measures (Dia. x D) 4.1" x 3.3" (102.5mm x 83mm), weighs 9.7oz (278g) and is depth rated to 330' (100 meters). The distance between the mount and the inner glass surface is 2.1" (53.5mm).