Optical Dome Port II 230 #30137

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 overwater images. Peripheral image quality will be even better when used with an internal correction lens.

Features
・ High-quality BK7 crystal glass used.
・ Two different anti-reflection coatings are used to optimise image quality, one for the exterior and one for the interior of the optical domes. A multi-layer coating is used on the outside of the dome and the inside of the domes is covered with silicon dioxide to effectively suppress over-illumination and ghosting. As a result, the refractive index of each port is reduced to less than 0.01% and the Domes produce images with extremely high contrast.

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