Product parameters: Passage diameter: 70mm (2.4′′) Focal length: 300mm.f/4 Mirror: 90° The highest height of the warp and weft platform and aluminum tripod: 38cm The maximum magnification of this model: 150 times (objective lens focal length / eyepiece focal length * several times multiple = maximum magnification) The attachment contains: Zenith mirror: 90 degree zenith mirror Eyepiece: H20mm, H6mm Filter: Moon Filter Tripod: 380mm height aluminum tripod Other accessories: lens tilt adjustment handle Installation order: The tripod is first supported. Then attach the lens barrel. After the lens barrel is fixed, a mirror (used to initially find the target object) is mounted on the lens barrel, and then the eyepiece is attached (eyepiece 2 is selected 1). After finding the big target, then debug with different eyepieces. Note: For the first time, be patient and patient! The possibility of bad astronomy is very, very small, not to mention the fact that every telescope we checked before was strictly checked. Do not look directly at the sun with the naked eye. Observe that the sun uses a sun filter, otherwise it will hurt your eyes.