Hoya 77mm Uv Filter. How To Clean Particulate Filter.

Hoya 77mm Uv Filter

hoya 77mm uv filter
    uv filter
  • This coating is a filter for the harmful UV radiation. The coating is either put on the lens or is imbedded into the lens to protect your eyes for the harmful effect of the sun’s UV radiation.
  • This is an Ultra Violet absorbing filter that helps overcome the abundance of blue in outdoor photographs. Not really necessary in digital photography as the camera's white balance system adjusts for the colour temperature of the scene.
  • UV filters are individual compounds or mixtures to prevent ultraviolet (UV) light from coming through. UV filters are used in sunscreens to protect skin or in photography to reduce haziness or fogginess created by ultraviolet light.
  • any plant of the genus Hoya having fleshy leaves and usually nectariferous flowers
  • Hoya is a genus of 200-300 species of tropical climbing plants in the family Apocynaceae (Dogbane), native to southern Asia (India east to southern China and southward), Australia, and Polynesia. Common names for this genus are waxplant, waxvine, waxflower or simply hoya.
  • Asclepias L. (1753), the milkweeds, is a genus of herbaceous perennial, dicotyledonous plants that contains over 140 known species. It previously belonged to the family Asclepiadaceae, but this is now classified as the subfamily Asclepiadoideae of the dogbane family Apocynaceae.
  • A climbing or sprawling evergreen shrub with ornamental foliage and waxy flowers, native to Southeast Asia and the Pacific and grown as a greenhouse or indoor plant
hoya 77mm uv filter - Hoya 77mm
Hoya 77mm UV (Ultra Violet) Multi Coated Glass Filter
Hoya 77mm UV (Ultra Violet) Multi Coated Glass Filter
Absorbs the ultraviolet rays which often makes outdoor photographs hazy and indistinct. A muliti-purpose fine-weather filter for color as well as black and white films. Also serves as a permanent lens protector. HMC (Hoya Multi-Coating) These popular filters are renowned for their ability to minimise reflection at the filter surfaces which reduces flare and ghosting. The result is an average light transmission of over 97%, giving sharp contrast and well balanced color. HOYA HMC filters are recommended for enhancing the performance of today's multicoated lenses.

76% (8)
Do UV Filters Absorb UV?
Do UV Filters Absorb UV?
This image was taken with an El-Nikkor 75mm f/4 mounted on a UV-VIS-IR self-converted Nikon D200. A 2" Baader U-Filter provided visible and infrared light filtration. An SB-800 with its Fresnel lenses removed provided illumination. The glass filters in this photo include: Top -> B+W 77mm UV Haze Left -> Hoya 77mm UV Right -> Quantaray 77mm 1A Bottom -> Toshiba 52mm S L39 3 (UV) The Toshiba filter (which is quite old) is the only one that appears to absorb a good deal of UV, at least within the UV range detected by the D200 (around 340-400nm).
Hoya 77mm UV Filter
Hoya 77mm UV Filter
This 77mm UV filter is allowing 93% of UV light to pass through. That is a lot since an untreated lens usually allows a little less at 90%. I also checked both lenses for any polarization and found none. Providing a little FYI just in case anyone ever wondered what there UV filter was doing.

hoya 77mm uv filter
hoya 77mm uv filter
Hoya PRO1 Digital - Filter - UV - 77 mm
Hoya DMC PRO1 Digital Filters are specifically designed and engineered for Digital SLR Cameras. Digital Multi Coated (DMC) construction greatly reduces lens flare and ghosting. The Black Almite Frame (BAF) is a black matte finish aluminum frame that reduces reflections to enhance contrast. In addition, the Black Rimmed Glass (BRG) reduces light reflection around the filter edge. Low Profile Frame (LPF) is an Ultra thin frame which helps avoid vignetting on wide-angle lenses. The Knurled Edge Frame (KEF) aids easy attachment and removal. UV filter absorbs invisible ultraviolet rays which make outoor photographs hazy and indistinct and serves as a permanent lens protector.

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