Hoya HMC UV-IR Cut Filter for Digital Imaging Size:67mm - $147.90 The 81B color correction filter

The 81B color correction filter warms the ambient light entering the lens by 300° Kelvin by adding orange to the overall exposure

or just about any non-metallic surface

while the low-profile form eliminates vignetting when used with ultra-wide angle lenses

effect can be minimized or exaggerated by changing the aperture

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

Hoya HMC UV-IR Cut Filter for Digital Imaging Size:67mm - $147.90 The 81B color correction filterDescription The Hoya UV IR Cut filter cuts higher frequency ultra violet (UV) rays and lower frequency infrared (IR) light rays, allowing only light rays in the visible spectrum to pass through the filter and into the camera. This filter also reduces the effects of atmospheric haze.