The Hitech 85mm Yellow No. 8 Resin Filter is 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. This filter measures 85 x 85mm and fits the Cokin P series holder and the Hitech "P" series holder. The Filter factor is 2 (+1 stop).