The Laowa 17mm f/4 GFX Zero-D is a manual-focus, rectilinear ultra-wide prime made specifically for Fujifilm G-mount medium-format cameras. Its 113° angle of view and 20 cm minimum focusing distance make it particularly interesting underwater, where getting the camera close to a reef, wreck or foreground subject helps reduce the amount of water between the lens and subject while preserving an expansive background. 

For a properly configured Nauticam N120 Fujifilm G-mount system, current port-chart documentation lists the lens with the WACP-2 for a converted 140° field of view, as well as 230 mm and 250 mm optical glass dome-port configurations. That makes this one of the more specialized Laowa lenses for high-end medium-format underwater wide-angle photography. 

• Best for: reef scenics, wreck interiors, close-focus wide angle, large animals and dramatic medium-format landscapes underwater.
• Main advantage: extremely wide rectilinear coverage without the characteristic curved rendering of a fisheye lens.
• Compatibility: native Fujifilm G mount; underwater port, extension and focus-control requirements depend on your exact housing.
• Major differentiator: 17 mm focal length, 113° view and 20 cm minimum focus give it more extreme coverage and closer focusing than Fujifilm's GF 23mm f/4.
• Tradeoff: this is manual focus only, and a serious GFX wide-angle underwater configuration can require substantial port hardware.
• Why Bluewater Photo: we can help match the lens to the correct housing, focus gear, extension ring and port instead of treating the lens as an isolated purchase.

Designed for use with:

• All Cine Cameras
  • FUJIFILM GFX ETERNA 55 G/PL Mount
• Medium Format Cameras
  • FUJIFILM GFX 100
  • FUJIFILM GFX 100 II
  • FUJIFILM GFX 100S
  • FUJIFILM GFX 100S II
  • FUJIFILM GFX 50R
  • FUJIFILM GFX 50S
  • FUJIFILM GFX 50S II

Quick Specs

Why the Laowa 17mm GFX Stands Out Underwater

Most Fujifilm G-mount wide-angle choices force you to choose between a less-extreme prime or a more versatile zoom. The Laowa takes the opposite approach: it gives you a fixed 17mm rectilinear perspective, very close focusing and deliberately simple manual operation.

That combination is attractive when your priority is maximum scene coverage and close-focus wide-angle rather than autofocus or zoom flexibility. Compared with the GF 23mm f/4, the Laowa is substantially wider and focuses closer; compared with the GF 20-35mm f/4, it gives up autofocus and zooming in exchange for a wider native view and a 20 cm minimum focus distance. Fujifilm lists 99.9° and 38 cm for the GF 23mm, while the GF 20-35mm covers 108°-76° with a 35 cm minimum focus distance. 

Features That Matter Underwater

113° Rectilinear Coverage Without a Fisheye Look

Laowa's Zero-D designation is aimed at keeping geometric distortion very low for such a wide rectilinear lens. Underwater, that is useful when photographing wreck structure, reef walls, divers or other subjects where you want an expansive frame without pronounced fisheye curvature. 

• Fits large subjects into the frame from close range
• Useful for wreck lines and structured reef compositions
• Maintains a rectilinear rather than fisheye rendering

20 cm Minimum Focus for Close-Focus Wide Angle

The 20 cm specification is measured from the sensor plane, not from the front of the lens or port, but it still gives the Laowa considerably more close-focus flexibility than many GFX wide-angle alternatives. Getting physically closer to a foreground subject is one of the most useful ways to reduce water-column haze and retain contrast underwater. 

• Strong foreground-to-background perspective
• Useful for coral heads, anemones and reef structure
• Lets you work close while retaining an expansive environment
• Pairs especially well with carefully positioned wide-angle strobes

A Lens for Deliberate Manual-Focus Shooting

There is no autofocus here. For static reef scenics and wreck work, manual focus can be very workable with the proper housing control and a considered aperture, but fast-moving animals are less forgiving.

• No autofocus mechanism to manage
• Housing focus control remains important for changing subject distances
• Do not assume a topside pre-focus position will remain ideal behind a dome; verify focus underwater
• Better suited to photographers comfortable with deliberate manual technique

Why Buy Your Laowa Lens from Bluewater Photo?

Laowa has built its reputation around specialty wide-angle and macro optics rather than a conventional general-purpose lens catalog. With an underwater system, however, lens quality is only part of the purchase—the focus control, extension, port and lighting configuration all have to work together. 

Content reviewed by Bluewater Photo staff, recognized as the #1 online retailer specializing in underwater photography and scuba diving equipment, with real-world experience supporting, selling, and configuring underwater camera systems.

Ready to Build Your GFX Wide-Angle Setup?

Confirm your housing and port configuration before finalizing the system.

Expert support from underwater photographers.

Guides & Articles

• Bluewater Photo Underwater Photography Equipment Guides
• Bluewater Photo: Acrylic vs Glass Dome Ports
• Underwater Photography Guide: Dome Port Optics
• Underwater Photography Guide: Close-Focus Wide Angle

Dome-port selection and close-focus technique have a major effect on wide-angle results underwater.