Hoya C12 Cooling Filter – 80A Color Conversion for Tungsten Light macro It was originally created for

It was originally created for film photographers to "intensify" warm fall colors on overcast and cloudy days

Filter Factor: 2 stops Glass Type: Hoya Optical Number of Multi-Coatings: 6 layers / 3 per side Hardened Top Layer: No Anti-Static: No Frame Construction: Standard Profile / Aluminum Front Filter Threads: Yes

The size is usually written on the back side of the lens cap

Highlights are smoothly diffused to produce controlled bloom and natural halation without flattening contrast or washing out detail

Hoya C12 Cooling Filter – 80A Color Conversion for Tungsten Light macro It was originally created forDescription The C12 color conversion filter allows you to match the white balance of 3200K tungsten balanced (warm) ambient light sources entering the lens to match Daylight balanced 5500K films. C12 filters cool the light source by 2200K ( 120 mired shift) by adding a very dark blue to the overall exposure. The Hoya C12 filter is helpful when: You are using daylight balanced film and the light source is very warm and you want to to record accurate