Product Description: Application: Connect mobile device holder to telescopes to take photos TypeMobile device holder 1.Eyepiece bayonet connection: Compatible with telescope whose eyepiece outer diameter is between 26-43.5mm, suitable for mobile phones with a widthof 62-105mm 2.Rubber sucker connection: Connected to mobile device with camera or video function, such as smartphones, tablet computers. 3.Eyepiece bayonet: Internal diameter is between CM-8L:38.5mm-43.5mm CM-8SML:26mm-43.5mm 4.Lock catch: Rotate clockwise to narrow eyepiece bayonet, or anticlockwise to expand eyepiece bayonet, push up to fix eyepiecebayonet 5.Fine adjustment screw: Loosen to adjust eyepiece bayonet Attation: (1) Preferentially take photos with touch screen camera if your mobile device has this function. (2) Preferentially take photos with center focus if your mobile device has focus camera. (3) Keep it away from fire and heat. (4) If rubber sucker is stained with dust, rinse it for reuse. (5) Do not scratch rubber sucker with sharp objects, or its service life will be affected. ColorBlack Material:Plastic, soft rubber and metal Package: 1 x Mobile device holder