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Nauticam Wide Angle Conversion Port with Float Collar for Sigma 18-35mm Lens

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Nauticam Wide Angle Conversion Port Set (WACP)

Designed for Sigma 18-35mm F1.8 Lens

Includes N120 to N100 Port Adapter and Aluminum Bouyancy Collar.

The Nauticam WACP, Wide Angle Conversion Port is a completely revolutionary style of water contact optics. This dry port is very similar to the incredibly sharp, quality Nikonos lenses of yesteryear, designed specifically, and only intended for underwater use. This port is specific to full frame cameras when using a 28mm lens. See below for a list of compatible lens options.

While this looks like a standard dome port, upon holding it the weight alone proves it is much much more, and is really a lens disguised as a dry port. The WACP is a wide angle conversion port which unlike traditional ports or wet-mate corrective wide-angle lenses, modifies a 28mm equivalent lens to an extremely sharp 130º. 

Better than many standard wide angle lenses, the WACP can focus from directly in front of the front element to infinity allowing for extremely close-focus wide angle shooting. In addition the primary benefit to the WACP is the improvement of corner sharpness. Most wide angle lenses used behind dome ports suffer from soft and blurry edges. The WACP, a specific water contact optic port, eliminates that corner sharpness, providing the user with clear, sharp images across the board.

Manufactured On-Demand: Non-Cancellable, Non-Refundable and hmight require 3-5 Weeks Lead Time


  • Depth Rating: 100m
  • Weight on Land: 3.9 kg
  • Weight Underwater: 0.32 kg
  • Body Construction: Hard-anodized Aluminum Alloy
  • Lens Construction: 6 Elements in 5 Groups
  • Lens Coating: Anti-reflective on both sides

Compatible Lenses:

  • Sigma 18-35mm f/1.8 DC HSM | A

What's Included:

  • Hard Lens Cap and rear port cap (N120)
  • N120 to N100 35mm port adaptor
  • Carrying Bag
  • Nauticam Aluminium Float Collar (Nau-85221)

Product Video:


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Weight: 3.00 LBS
Dimensions: 6.00 (in) × 4.00 (in) × 6.00 (in)
Free Worldwide Shipping: No
Brand: Nauticam

We offer lifetime support with all purchases.
Please call or email us with any questions, our knowledgeable staff would love to assist you.

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