Compact mini scope designed for astrophotography telescopes 32mm scope with bright, wide-field optics puts numerous potential stars in view With front and rear dust cover to prevent dust from entering and prolong the use time Adjustable focal length, 360 smooth rotation; Convenient installation, screw hole at the bottom of the tail , directly fixed installation The telescope attached to the main telescope tube to monitor the star, its function is to ensure that the main telescope accurately tracks the observed celestial body. Once the star deviates correctly, it will be corrected by the driving device of the telescope Note: The product needs to be equipped with eyepieces. The product does not contain eyepieces and tracking drive devices Specification: Material: Metal Scope Size: Approx. 4.5x12cm/1.77x4.72inch Bracket Size: Approx. 5.5x7.7cm/2.16x3.03inch Package Includes: 1 Piece Scope 1 Piece Bracket Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.