Hoya YHDPROT040 HD Protector Super Multi Coated 40.5mm Filter

The Hoya YHDPROT040 HD Protector is a 40.5mm clear lens filter built around ultra-clear, high-transparency optical glass that has been hardened for superior scratch and impact resistance. Its primary purpose is straightforward — safeguard your front lens element from dust, fingerprints, moisture, and accidental contact without compromising the image quality you paid for. The 8-layer anti-reflective multi-coating on both sides of the glass ensures that light transmission remains high while ghosting and flare are kept to a minimum, even when shooting toward bright light sources.

What sets the HD Protector apart from standard protection filters is the combination of its hardened glass and repellent coatings. The water and oil repellent surface treatment causes liquids and smudges to bead rather than spread, making field cleaning far simpler. The ultra-thin aluminum frame is designed with wide-angle shooters in mind, reducing the chance of vignetting at shorter focal lengths. For photographers using compact mirrorless cameras with 40.5mm filter threads — such as select Sony E-mount or Nikon 1 lenses — this filter adds meaningful protection with negligible weight and no visible optical penalty.