PLEASE NOTE:This product is discontinued and no longer being manufactured by the factory. It is possible that inventory is available through retailers and online.
The 81B color correction filter warms the ambient light entering the lens by 300° Kelvin by adding orange to the overall exposure. The filter helps fine-tune the color or look of your scene to match your film's white balance.
The Hoya 81B filter is helpful when:
You are using daylight-balanced film and the light source is cooler than the traditional 5500° K and you need a specific amount of color correction to match your film type.
You would like to add a slightly warmer look to your portraits.
You are shooting in overcast conditions and there is a blue color cast.
HOYA Multi-Coat (HMC) filters are recommended for enhancing the performance of today’s multicoated lenses. These popular filters minimize reflection, reduce flare and ghosting, and result in over 97% average light transmission.
Comparison of 81 Series Conversions:
|FILTER||Warming Amount (in degrees Kelvin)|
|Filter Factor:||1/2 stop|
|Glass Type:||Hoya Optical|
|Number of Multi-Coatings:||6 Total / 3 each side|
|Hardened Top Layer:||No|
|Frame Construction:||Standard Profile / Aluminum|
|Front Filter Threads:||Yes|