INON UCL-90 M67 Underwater Close-up Lens

The INON UCL-90 M67 is a high-quality underwater close-up lens that provides excellent optical performance. Its design focuses on delivering sharp images with minimal aberrations, making it a popular choice among underwater photographers. The lens features high refractive (HR) glass, which contributes to its compact size while allowing for a longer working distance.

Key Features

• High Magnification: The maximum magnification when using this lens with a 100mm range macro lens for a full-frame SLR system is x2.23 (area ratio x4.98) which delivers middle power in between "UCL-67 M67/UCL-67 LD" (+15 diopter) and "UCL-165M67/UCL-165 LD" (+6 diopter). High power close-up lens with an underwater focal length of 90mm, delivers an equivalent to +11 diopter.
• Long Working Distance: While the UCL-67 delivers high magnification, it still offers a long working distance. When using a 100mm range macro lens for SLR, the working distance is 69mm (2.71in) at the minimum focusing distance.
  Together with its compact size, the lens supports friendly lighting even at minimum focusing distance.
• Optical Design: The lens is specifically engineered for underwater use, suppressing optical aberrations across all focus ranges. This ensures high contrast and sharpness, even in challenging lighting conditions. Using HR glass makes lens size compact, supporting a wide range of camera systems from 100mm range macro lenses for SLR to compact digital cameras. Also, a compact lens body has fewer limitations on lighting, enabling you to use a wide variety of lighting techniques.

Compatibility and Mounting Options

The INON UCL-90 M67 lens is designed to be versatile, compatible with various camera systems and macro ports. Understanding its compatibility will help you make the most of this powerful lens.

• Full-Frame SLR Cameras: The lens works seamlessly with 60mm-100mm range macro lenses for full-frame digital SLRs.
• APS-C Cameras: It is also compatible with 40mm-60mm range macro lenses designed specifically for APS-C sensors.
• Micro Four Thirds: Photographers using Micro Four Thirds systems can utilize the UCL-90 with 45mm-60mm range macro lenses and standard zoom lenses.
• Compact Digital Cameras: The lens can be used with compact digital cameras featuring a maximum optical zoom of 5x or less.

Construction and Materials

The UCL-90 M67 is constructed with three elements in two groups, utilizing achromat lenses to effectively reduce chromatic aberration. The anti-reflection coating on all lens surfaces minimizes flare and ghosting, further enhancing image quality. The lens is made from corrosion-resistant aluminum alloy, ensuring durability in saltwater environments.

Mounting System

The INON UCL-90 features an M67 screw mount system, allowing easy attachment to compatible lenses. For added flexibility, an optional M67 Flip Mount Adapter is available, enabling the lens to be used with flip lens holders from various manufacturers.

Other Considerations

Stacking multiple lenses may cause vignetting at the zoom wide end. As you stack more lenses, the focusing distance gets shorter and the depth of field gets shallower as well.

Generally, a close-up lens shortens the camera’s close-focusing distance. With this product, you can place your camera closer to a subject, achieving a larger image. On the other hand, depending on the zoom or aperture setting, it may be more difficult to obtain complete depth of field on a distant subject.

Related Underwater Gear Categories:

• Inon underwater gear
• Underwater Strobes & Flashes
• Underwater Video Lights