Optical Dome Port II 100 (3 Versions)
Product no. 30133 / 30134 / 30135

100 mm diameter. The most compact and lightweight optical dome port offered by SEA & SEA. Exclusively designed for fisheye lenses.
Optical Dome Port ll 100 S (# 30133) (item on order) Designed exclusively for Nikon AF DX Fisheye Nikkor ED 10.5mm F2.8 Optical Dome Port ll 100 M (# 30134) Designed exclusively for Tokina AT-X 107 DX Fisheye 10-17mm F3.5-4.5, for Nikon and Canon cameras. Optical Dome Port ll 100 L (# 30135) Designed exclusively for Canon EF 8-15mm F4L USM and Nikon AF-S Fisheye Nikkor 8-15mm F3.5-4.5 E ED.

Features
・ Used high-quality BK7 crystal glass.
・ Two different anti-reflection coatings are used to optimise image quality, one for the outside and one for the inside of the optical domes. A multilayer coating is used on the outside of the dome and the inside of the domes is coated with silica to effectively suppress over-glare and ghost images. As a result, the refractive index of each port is reduced to less than 0.01% and the Domes produce extremely high-contrast images.
Difference in image quality between the Fisheye Dome Port 240 and the Optical Dome Port l 165 under backlight.
Equipment used: Canon 5D Mark lll and EF 16-35mm F2.8L ll. Depth: 5 m

Specifications
Dimensions (DIAxD): 130 x 64.5 (S) / 81 (M) / 91 (L) mm / 5.1 x 2.5 (S) / 3.2 (M) / 3.6 (L) inch
Weight: Approx. 372 g / 13.1 oz (S) 423 g / 14.9 oz (M) 450 g / 15.9 oz (L)
Depth rating: 100m / 330ft
Construction: POM resin, BK7 crystal glass, (dome) and corrosion-resistant aluminium alloy (cap)
Accessories: Operating instructions, gate valve, gate box