for people that want to take pictures with telescope, binoculars, spotting scope and microscope using smartphone. This adapter is designed with 24-55mm clamp opening which is adjustable and suitable for eyepieces with 24-55mm diameter barrel in the market. The material is reinforced Nylon filled with glass fiber, it is much more stronger for all kinds of smartphones. Phone supporter width can be wider than 95mm, which is best for some very large phones. Phone supporter may rotate 320 degrees, suitable for different camera lens location of any phones. Padded with thin foam, it may protect your phones from scratches. With 1/4-20 threaded nut, it may be used with camera mount.