Hoya 49mm Yellow #K2 (HMC) Multi-Coated Glass Filter for Black & White Film

Commonly used for a noticeable increase in contrast with black and white films. Especially useful for clear contrast between blue sky with clouds and foreground. It is also suitable for landscapes and nature scenes. Multicoated to minimize reflection at the filter surfaces which reduces flare and ghosting.

Filter factor is 2 (+1 stop)