This focus gear is designed to provide smooth manual focus control for a compatible 8mm f/1.8 fisheye lens when used inside select underwater housings. Constructed from durable rubber, it integrates with the PPO-EP02 lens port, allowing photographers to make precise focus adjustments without removing the lens from the underwater setup. Ideal for underwater imaging applications, this accessory enhances creative control and helps achieve sharp, accurate focus while diving or shooting beneath the surface. | Olympus | | Manual Focus Gear for 8mm Fisheye Lens Compatible with Underwater Lens Adapter Port and Housing Systems | Black | Best Buy