Hoya CIR-PL UV 49mm HRT Circular Polarizing Filter

The Hoya 49mm HRT Circular Polarizing Filter represents a meaningful upgrade over conventional CPL filters by incorporating Hoya's High-Rate Transparency polarizing film. This advanced film transmits approximately 25% more visible light — roughly one-third of a stop — compared to standard circular polarizers, all while filtering the same amount of polarized light. The practical benefit is a brighter viewfinder image that makes composition and manual focusing easier, along with improved performance in lower-light conditions where every fraction of a stop matters. The filter simultaneously absorbs ultraviolet light, combining two functions into a single piece of glass and eliminating the image-degrading effects of stacking separate CPL and UV filters.

Built with multi-coated optical glass, the HRT minimizes surface reflections and internal ghosting to maintain clean, accurate light transmission. The slim, low-profile aluminum frame is engineered to avoid vignetting on wide-angle lenses, a common concern with thicker filter designs. Black-rimmed edges inside the filter help suppress stray light reflections within the filter housing itself. The smoothly rotating front ring lets you precisely control the degree of polarization, managing glare from water, glass, and other non-metallic surfaces with fine adjustment. Water-resistant construction adds durability for outdoor shooting in variable weather. For photographers who want the benefits of polarization with less light loss and built-in UV protection, the HRT delivers a thoughtfully engineered solution in a compact, single-filter package.