Common telescopes: 70500, etc. Low magnification: The finderscope is an auxiliary telescope used to help you locate objects in the main telescope. Provides 5X low magnification magnification to help you find objects as quickly as possible. Initial positioning: 5x24 low-power wide-angle telescope, fixed on a more powerful telescope body, pointing in the same direction, is used for initial positioning of the object to be observed. Installation method: Slide the mounting bracket of this finderscope into the dovetail base and fix it to the telescope tube with screws. Light weight: This finderscope is , very easy to install, very easy to carry and store, and does not take up space. Plastic and resin materials: Our finderscope is made of plastic bracket, plastic and resin lens, with excellent craftsmanship and strong durability. Magnification: 5X Objective lens diameter: 24mm (27mm measured outside) Eyepiece diameter: 11mm Lens material: resin lens Bracket material: plastic Tube material: plastic Base: plug-in Colour:Black Material:plastic Package Contents: 1 * finderscope 1 * plug-in bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.