The Lee 3x3" Light Yellow #3 Polyester Filter for Black & White Film is commonly used to raise contrast slightly with black and white films. Especially useful for clear contrast between blue sky with clouds and foreground. It is also suitable for portraits, landscapes and nature scenes.
Lee gelatin filters are available in 3 x 3" (75 x 75mm) and 4 x 4" (100 x 100mm).
LEE Filters 3P3 Specs
3 x 3" (75 x 75mm)
1.5 (+.5 stop)
Raises constrast slightly with black and white film