The Snoot XTR isolates the light to a very specific area, approximately 10 degrees. The telescoping extender enables the photographer to consistently isolate the light to an area of 5 degrees or less. Automatic operation will be affected as illuminated area is limited; bracketing and/or testing is recommended. To illuminate a specific area of a scene with little or no effect on the surrounding area. Great as a hair or accent light. Bundle includes an UltraStrap, the most secure non adhesive mounting strap in the industry.