The Formatt 138mm Yellow 8 Glass Filter is commonly used for a noticeable increase in contrast with black and white films.

There are occasions when your image needs even more than subtle nudge - something to bring the contrast up even more than a Yellow 6.  The #8  filter is the next step up the contrast ladder and produces more "snap" than either the #3 or #6 filters. 

If used with color film, it will render everything yellow producing a more pronounced surreal effect.

• Enhances landscapes, marine scenes and aerial photography with more effect than a Yellow 6 filter
• Especially useful for a noticeable increase in contrast between blue sky with clouds and foreground