1.3 LOCK CLASP: Easily adjust the eyepiece bayonet by turning it clockwise or counterclockwise for a secure fit. Press up to lock the eyepiece bayonet in place. Product Description: - Eyepiece Bayonet: Designed with an inner diameter of 22.5-48mm, ensuring compatibility with a wide range of eyepieces for versatile use. - Rubber Suction Cup: Securely attaches to your mobile device, providing stability during use. Key Benefits: - Versatile Compatibility: The adjustable inner diameter allows you to use this eyepiece bayonet with various optical devices, enhancing your viewing experience. - Secure Attachment: The rubber suction cup guarantees a firm hold on your mobile device, preventing slips and ensuring optimal performance. Practical Applications: - Photography: Ideal for attaching your smartphone to telescopes or microscopes, allowing you to capture high-quality images and videos. - Outdoor Exploration: Perfect for nature enthusiasts who want to use their mobile devices to enhance their view through binoculars or spotting scopes. - Educational Use: Great for students and educators looking to document experiments or observations through optical instruments with ease. This product combines functionality with ease of use, making it a must-have for anyone looking to enhance their optical experience.