Kenko Red Enchancer
The Kenko Red Enhancer is made specifically for color reversal film or "diafilm" applications that make red colors stand out. On diafilm it is very hard to isolate red colors and red colors can come out very dull.
The Kenko Red Enhancer is made from high quality optical glass and features multi-coating technology to give you the highest quality images possible.
The Red Enhancer will not enhance red colors on digital cameras and will create a green cast to your photos.