The Hoya 58mm UV HRT Circular Polariser filter is a revolutionary design that combines two filters; UV and Circular Polariser into one high-quality filter in a single ring. This filter eliminates reflections and ultraviolet (UV) rays to cut through glare. The High Resolution and Transmission polarising film (HRT) helps ensure vivid and saturated colours, with better contrast. It is highly recommended for landscape photography and photographing shiny non-metallic materials or surfaces such as water, glass, watches, paintings etc.
Hoya 58mm UV HRT Circular Polariser Filter
Hoya Coating and Multi-coating, the quality difference.
Hoya manufactures a full line of filters in both standard and Hoya multi-coated. The difference between Hoya’s standard line and that of other manufacturers is that Hoya standard filters have one layer of anti-reflective coating applied to each surface of the glass. Many other manufacturers standard filters are bare glass, and bare glass can reflect as much as 9% of the light hitting it. This greatly increases the risks of flare and ghosting.
Hoya believes the filter frame is an extremely important part of the filter as well. Hoya uses machined aluminum frames to hold their high quality glass. They prefer aluminum to other materials because it is strong enough to hold up to years of use. Some say that brass is the best material to use, however, Hoya doesn’t hold that view and here is why; brass is a far more rigid material than either aluminum or the polycarbonates that are being use in today’s lens barrels. This means that, should the front of the lens get hit, the rigid brass filter ring will transfer almost all the force of the shock to the lens barrels and mechanics. An aluminum filter frame will absorb some of the shock by bending and at a certain point the glass will chip or break, which is what the filter is supposed to do, protect the lens. Replacing a filter is always preferable to getting a lens repaired.
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