Optical Dome Port II 230
Product no. 30137

System example

Diameter 230 mm. Versatile optical dome port, compatible with various fisheye and wide-angle lenses. Provides the best image quality, including peripheral image quality. Suitable for half underwater and half above images. Peripheral image quality will be even better when used with an internal correction lens.

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-radiation 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): 250 x 120 mm / 9.8 x 4.7 inches
Weight: Approx. 2100 g / 74.1 oz
Depth rating: 100m / 330ft
Construction: corrosion-resistant aluminium alloy (anodised), BK7 crystal glass, (dome) and POM resin (cap)
Accessories: Instruction manual, optical dome gate valve, gate housing