Ultraviolet (UV) camera filter Hoya HD Mk II

The Hoya HD Mk II UV is a 49 mm ultraviolet camera filter designed to protect the front element of your lens while reducing haze and blue color cast caused by UV light. Made from chemically reinforced optical glass and finished with high-transmittance anti-reflective coatings, this black single-piece filter combines robust physical protection with optical clarity, and is suitable for use on a wide range of lenses including wide-angle optics.

Advantages

The filter uses HD reinforced UV-cut glass that is chemically strengthened to be up to four times more resistant than ordinary glass, providing durable protection against scratches, dirt and bumps. A high-transmittance 16-layer anti-reflective coating on both sides reduces reflections and includes water- and oil-repellent properties for easier cleaning. The low-profile, ultra-thin frame is mounted with high-pressure press technology for added stability and minimizes vignetting when used on wide-angle lenses. The UV-cut element reduces haze and blue color cast without altering visible-light colors, helping maintain sharper, clearer images.

Suitable for

• Protecting front lens elements from scratches, dust and impacts
• Outdoor and landscape photography where UV haze can affect clarity
• Everyday use on walkaround and wide-angle lenses
• Photographers seeking durable, long-lasting lens protection

Key specifications

• Filter type: Ultraviolet (UV) cut
• Model: Hoya HD Mk II UV
• Diameter: 49 mm
• Glass: Chemically reinforced optical glass (higher strength)
• Coating: 16-layer high-transmittance anti-reflective, water- and oil-repellent
• Frame: Low-profile, ultra-thin, high-pressure press mounting
• Color: Black
• Packaging: Single filter

How to use

Screw the filter onto the lens front thread (49 mm diameter) until it seats gently; do not over-tighten. Use the filter as a permanent protector during shooting or attach it when you expect dust, moisture or risk of impact. Clean the coated glass with a soft brush or blower to remove loose particles, then wipe with a microfiber cloth and, if necessary, a small amount of lens cleaning solution compatible with coated optics. Store the filter in its case when not in use to avoid scratches.

Usage recommendations

For optimal results use the Hoya HD Mk II UV on lenses with a 49 mm thread and when shooting outdoors or in bright conditions where UV-induced haze can reduce image clarity. The filter is particularly appropriate for advanced and professional photographers who require robust, long-lasting protection without color shifts.