For more contrast and color saturation: The Red Enhancer, also known as the Didymium Filter or Intensifier, enhances contrast and boosts color saturation through its special coloration. Red, orange, and brown particularly benefit from the use of the Red Enhancer. The advantage is that the filter has little impact on other colors. This color filter is especially suitable for architecture when it comes to emphasizing specific areas. The use of the Hoya Red Enhancer is also highly recommended in autumn foliage or rocky environments.