The Hoya 62mm 80A Hoya Multi-Coated (HMC) Glass filter is blue. It is used to balance daylight film under artificial, tungsten or standard (household) incandescent lighting. This filter allows you to "balance", i.e. bring back, correct color tone to your images.
There is some loss of film speed that may require the use of a tripod but, at least, your photos will demonstrate the proper tonality they so richly deserve. The advantage of Hoya filters is that Hoya puts one layer of anti-reflective coating on each side of their glass. It is not bare glass. Even if the glass is not multi-coated, this kind of production tends to minimize flare and ghosting.
Multi-coated to minimize reflection at the filter surfaces which reduces flare and ghosting.
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