1、Reliable Performance: The surrounding star dots have excellent image fields and the color control is also just right. The astronomical telescope guider can not only be used for astrophotography, but also serve as an excellent guider. 2、Three Optical Lenses: The astronomical telescope guid scope uses three optical lenses, one of which is APO grade and supports astronomical cameras and SLRs. 3、Light and Portable: Cooperate with different camera connectors, focus and leave margin. The portable theme allows you to easily carry your bag and hit thesky in the wilderness. 4、With Dovetail Plates: When used as a manual telescope, ground photography also brings good images. Equipped with different dovetail plates, it can be fixed on the star finding slot and equator. 5、Screw Fixation: 1/4 inch bottom screw pattern, easily fixed in different positions. Exquisite workmanship, beautiful appearance, portable size. Item Type: Astronomical Telescope Guidscope Material: Aluminum Alloy, Optical Lenses Weight: Approx. 413g / 14.6oz Caliber: Approx. 41mm / 1.6in Focal Length: Approx. 128mm / 5.0in End Interface: M42 x 0.75, 1.25 Inch Socket 1 x Astronomical Telescope Guidscope 3 x Screw 1 x Screw Ring