The Fresnel Spot S-Mount Attachment 10-40° from Impact is a clever light shaper that allows you to do sharp shadow, long throw or old-style Hollywood effects with your S-Mount LED head or monolight flash head. A simple rotation of the barrel adjusts the focusing range from 10° spot for maximum crispness to 40° flood for wider coverage. Four colored gels are provided and snap into place for additional creative effects. This attachment works only with LED lights up to 100W and does not work with Aputure c120d or Aputure c300 LED lights.