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82mm amber glass camera filter with multi-coating

HOYA Filter

HOYA Filter 82mm W12 Umber Warming Color Conversion Multi-Coated Glass Filter

SKU CH-CFQY-2Y7Z1

82 mm warming filter shifts colour temperature by 2200 K for tungsten film in daylight with 97 % light transmission

  • Warms ambient light by 2200 K for natural daylight tones with tungsten film
  • Converts colour temperature +120 mired shift to balance tungsten film in 5500 K light
  • Multi-coated glass delivers over 97 % average light transmission
  • Reduces flare and ghosting with six layers of HMC coating
  • Equivalent to an 85B filter for standard tungsten-balanced films

Product Identity

The Hoya 82mm W12 Umber Warming Color Conversion Filter is a multi-coated glass accessory designed for film photographers. It attaches to 82mm lens threads and shifts colour temperature by 2200 Degree K.

Optical Behaviour

The filter adds a dark amber tone to neutralise the heavy blue cast from tungsten-balanced film in daylight. Six layers of HMC multi-coating minimise reflection and flare while maintaining over 97% average light transmission.

Deciding Specification

This filter provides a +120 mired shift, stronger than the W10, and is equivalent to an 85B filter. It is intended specifically for tungsten-balanced emulsions such as CineStill 800T used under 5500 Degree K light sources.

Highlights

  • Warms ambient light by 2200 K for natural daylight tones with tungsten film
  • Converts colour temperature +120 mired shift to balance tungsten film in 5500 K light
  • Multi-coated glass delivers over 97 % average light transmission
  • Reduces flare and ghosting with six layers of HMC coating
  • Equivalent to an 85B filter for standard tungsten-balanced films

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 82mm W12 filter on my lens without cross-threading the threads?

Align the filter's 82mm threads squarely with the lens barrel, turn gently clockwise until you feel the first thread engage, then continue smoothly; forcing it at an angle strips the fine threads and is the most common mistake.

Will the 6 layers of HMC multi-coating degrade and need replacement over time?

The HMC coating is hard-coated optical glass; it does not wear out under normal use, so no scheduled replacement is required — only replace the filter if the glass cracks or the coating is physically scratched.

At what point does the +120 mired shift limit colour accuracy under sustained daylight shooting?

The W12 filter provides a fixed 2200 K / +120 mired conversion; if ambient light exceeds roughly 5500 K the compensation overshoots, introducing a warm cast that cannot be corrected in-camera with tungsten-balanced film.

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