Protective filters safeguard the front glass of the lens from minor scratches and micro-damages that accumulate over time. By using them, direct contact of the front glass with dust, moisture, and stains is avoided, protecting the lens from annoying blurring or spots. Thus, the impact from frequent cleaning of the front glass burdens the filter, keeping the lens like new.

The Hoya HD Protector Filter series offers chemically enhanced optical glass, four times stronger than ordinary glass filters, making it more difficult to break. The 8 layers of anti-reflective coating provide protection against water and oils, as well as resistance against scratches and stains.