AOI UWL-03II-BLK Underwater 0.73X Wide Angle Conversion Lens Mark II for Action Camera & Phone

The AOI UWL-03II-BLK is a professional underwater 0.73X Wide Angle Conversion Lens Mark II designed for action cameras and smartphones. Whether you’re shooting diving adventures, snorkeling scenes, or underwater videos, this lens expands your field of view and enhances visual quality with premium optical construction and user-focused design.

Perfect for underwater content creators, this lens captures wider, immersive shots with minimal distortion while maintaining clarity and color accuracy.
 

Key Features

• Ultra-Wide Field of View: Expands shooting angle to approximately 140° underwater and 150° on land, letting you capture more of the scene in every frame — ideal for expansive underwater landscapes and group shots.
• High-Performance Optics: Built with 4 elements in 4 groups and multi-layer AR-coated glass for reduced flare and improved image contrast.
• Dome Front Element: The polycarbonate dome element with hard coating enhances underwater image quality and durability.
• Quick Release Mount: Comes pre-installed with the AOI Quick Release System-02 (QRS-02) mount, compatible with popular AD mounting adapters. Optional M55, M52, and M46 mounting adapters are available separately.
• Rugged Construction: Durable aluminum alloy barrel with hard-anodized finish and polycarbonate hood ensures robust performance in harsh marine environments.
• Water Depth Rating: Rated for use up to 60 meters (200 feet) deep, suitable for recreational diving and snorkeling.
• Lightweight Design: Weighs 364 g on land and 164 g underwater for easy handling during dives.
   

Specifications

• Optical Construction    4 elements in 4 groups
• Multi-Layer Coating    AR-coated glass with polycarbonate dome hard coating
• Field of View    ~140° underwater / ~150° on land
• Magnification    0.73× underwater
• Mount System    AOI Quick Release System-02 (QRS-02)
• Depth Rating    60 m
• Lens Barrel & Hood    Aluminum alloy (black hard-anodized) & polycarbonate
• Weight    364 g (land) / 164 g (underwater)
• Dimensions    99 mm (Diameter) × 40.3 mm (Height)
   

In the Box

• 1 × AOI UWL-03II-BLK Wide Angle Conversion Lens Mark II (with QRS-02 mount pre-installed)
• 1 × Dome Lens Hard Cover (DHC-02) – protective hard cap for storage and transport
• 1 × Rear Lens Cap (AOI QRS-02-RC1) – keeps the lens safe when not in use
• 1 × Lens Secure Line – safety tether to prevent accidental loss
• 1 × Lens Pouch – soft protective pouch for carrying and storage