Schneider's 37mm Coral 1 Filter is considered to be both a color-correction and a color-effects filter. This filter is used to warm cool lighting situations such as overcast days and scenes in open shade. Different strengths of filters can be used during filming to achieve the same degree of apparent warmth under different light conditions. This makes this filter particularly useful for maintaining a consistent color balance throughout an entire day of shooting, or to create a sunset or dawn effect during the day. This filter can be used to under-correct a scene in order to create an excessively blue look for added drama, and can also be used as a warming filter to create other dramatic effects.