Inon UCL-G165 II ZD Underwater Wide Close-up Lens
Part #: INO-4570018120947
The Inon UCL-G165 II ZD is a wide close-up lens developed specifically for use with action cameras such as the GoPro® HERO13 Black. It addresses the inherent limitations of deep focus systems in action cameras, which typically cannot achieve sharp focus on subjects within close range—approximately within 60 cm (2 feet)—when underwater. This makes standard GoPro cameras unsuitable for macro shooting below the surface without additional optical accessories.
Unlike traditional macro lenses for compact digital cameras, which often result in vignetting and a shallow depth of field when paired with wide-angle action cameras, the UCL-G165 II ZD is designed to maintain image clarity and support a functional depth of field (DoF) underwater. When mounted on a GoPro HERO13 Black, the lens provides a DoF ranging from approximately 10 cm (3.9 inches) to 35 cm (1.1 feet), measured from the front element of the lens. This allows for more practical focusing capabilities underwater while still capturing fine detail in close-up subjects.

The Inon attachment lens for GoPro features a slightly increased angle of view compared to standard close-up lenses, contributing to better framing while maintaining close working distances. It connects via the Inon ZD bayonet mount, enabling rapid and secure attachment or detachment underwater. When the lens is not in use, it can be safely stored using the Inon ZD Lens Holder, which attaches to compatible mounts for convenience and protection.
The Inon lens for GoPro is tailored to the optical characteristics of action cameras, which use fixed-focus, wide-angle lenses with a large depth of field. While these systems are ideal for capturing general scenes, they do not accommodate macro photography due to their minimum focus distance. Using a standard close-up or macro lens with a GoPro typically results in optical issues such as edge distortion and loss of sharpness. The UCL-G165 II ZD resolves these issues by delivering an optical solution specific to the needs of the GoPro underwater camera setup.
The lens construction and optical path have been engineered to avoid vignetting and maintain high image quality across the entire frame when used underwater with compatible cameras. This makes the Inon GoPro configuration suitable for users who require high-clarity close-up footage or still images in shallow water or diving conditions.
Compatible Systems and Mounts
- Inon ZD Bayonet Mount System: Ensures fast, reliable lens swapping underwater without tools.
- ZD Lens Holder Compatible: Offers safe storage when the lens is not in use, improving workflow underwater.
Key Specifications Inon UCL-G165 II ZD
- Type: Wide close-up lens
- Depth of Field Underwater: 10cm (3.9in) to 35cm (1.1ft) with GoPro HERO13 Black
- Design: Optimized for action camera optics
- Use Case: Enhances macro shooting underwater without focus hunting or vignette
Compatible Cameras
- HERO13 Black
- HERO12 Black
- HERO11 Black
- HERO10 BlackHERO9 Black
- HERO8 Black
- HERO7 Black
- HERO6 BlackHERO5 Black
- HERO4
- HERO3+ Black
- HER)
- HERO+
- HERO+ LCD
REQUIRED: Compatible INON "SD Front Mask" is required to use the attachment lens.