what type of filter?

[mattvillano]

I'm trying to find information on filters for camera lenses.
What type of filter is best for shooting outdoors with b&w film? WHich is the one that makes the clouds more pronounced?

 

[voodoocat]

You would use a Red filter to render the sky very dark. Add a polarizing filter to make it even darker.

 

[ksmattfish]

Yellow and orange, too. For less of an effect than red.