Also known as a 'didymium' filter, this is used to enhance red, orange and brown subjects to give more color saturation and contrast, while having very little effect on other colors.
It can be used in many situations such as architecture where certain building features need emphasising, or for landscapes to enhance foliage and rocky features.
Reviewed by 1 customers
I heard about it, saw it in magazines . Bought one and was WOWED!!