Metal Bahtinov Mask - Time saving focusing aid for webcams. Allows quick, precise focus and sharp images in seconds. - Made from metal for durability and long service life. Telescopic dew guard - Precision engineered for stable properties and high reliability in varying conditions. - Designed to integrate smoothly with the overall focusing system. Telescopic mask - Focusing mask designed to help you focus quickly. - Enables a webcam to achieve perfect focus in seconds. Bahtinov - Fine workmanship with a creative appearance. - Combines practicality with an appealing design that remains functional. Use scenarios - Live streaming and video calls: rapidly regain sharp focus when your subject distance changes, ensuring consistently clear video. - Desktop photography and product shots: reduce trial and error with quick, reliable focus to capture crisp images. - Amateur astronomy or telescope-based imaging: connect a webcam and use the Bahtinov mask to achieve precise focus quickly for clearer astronomical captures.