Description

AOI UWL M52 Mount Series Wide Angle Lens

The AOI UWL M52 series (UWL-04A, UWL-400A) wide angle wet lens are high-quality underwater conversion lenses and feature different optical profiles, field-of-view ranges, and camera compatibility. Lens use a standard M52 (52mm) thread mount and compatible with Quick Release Mount QRS-01-AD3 for easy lens exchange between Wide angle or Macro shoot.

Key Features & Choosing the Right Lens

1. AOI UWL-04 / 04A: The “Big Eye” for TG-Series Users
   • Extreme Field of View: Delivers a sweeping 160° fisheye perspective underwater. It maximizes dramatic distortion and deep perspective.
   • Optimized for Olympus TG-6 / TG-7: Designed specifically for camera housings with a 28mm equivalent focal length (like the Olympus PT-059). When paired with TG cameras, it offers a completely vignetting-free (no black corners) ultra-wide image.
   • Close Focus Wide Angle (CFWA): Features a 0mm minimum object distance, allowing you to push the dome lens right up to a small subject (like a nudibranch or anemone) while keeping a massive coral reef background in full focus.
2. AOI UWL-400 / 400A: The Versatile Solution for 1-Inch Sensor Compacts
   • Vignette-Free for 24mm Lenses: High-end compact cameras like the Sony RX100 series or Canon G7X series start at a wider 24mm equivalent focal length. Standard wet lenses cause dark corners (vignetting) on these systems. The UWL-400 is mathematically corrected to sit perfectly in front of 24mm lenses, delivering a rectilinear, natural 120° wide-angle view.
   • Technical Diving Grade: It features a reinforced construction depth-rated to 100 meters (330 ft), making it the preferred choice for tech divers or deep trimix exploration.
   • Both optics are wet lenses, meaning they can be attached or detached freely underwater. They can also both utilize the AOI QRS-01 (Quick Release System) bayonet system, allowing you to swap between these wide lenses and a macro diopter in seconds under the water.

UWL M52 Mount Series Wide Angle Lens
Model	AOI UWL-04A	AOI UWL-400A
Description	Underwater 0.42X Wide Angle Conversion Lens (Included QRS-01-AD3)	Underwater 0.50X Wide Angle Conversion Lens (Not Included QRS-01-AD3)
Lens Construction	5 Elements in 5 Groups
Lens Coating	All Glass Lens Elements with Multi-layers AR Coating, Front PC Dome Lens with Hard Coating
Field of View (Diagonal)	160°(with 28mm Lens)	Underwater 120°(with 25mm Lens)
Magnification	0.42X	0.50X (on land / underwater)
Minimum Object Distant	0 mm to the Front Dome Lens
Mount System	M52 Thread Mount / QRS-01 compatibility
Depth Rating	60 Meters / 200 Ft.	100 Meters / 330 Ft.
Lens Barrel / Lens Hoods	Aluminum Alloy with Black Anodize / ABS	ABS / Hard Anodized Aluminum Alloy
Dimensions	157mm (D) X92mm (H)	121.8mm (D) X76mm (H)
Weight	725 g (on land) 210 g (underwater)	606 g  (on land) 224 g  (underwater)
Accessories	Neoprene Dome Cover (DNC-04), Rear Lens Cap (LRC-01), Carry Case (LPC-03) and Adaptor (QRS-01-AD3)	Dome Lens Hard Cover (DHC-01), Rear Lens Cap (LRC-01), Lens Secure Line (LSL-03) and Carry Case(LPC-04)

*Specifications and Appearances are subject to change without prior notice.

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