materials and build: The Telescop Convenient features a optical glass lens and a metal optical tube. The main mirror body is made of aluminum alloy for light weight and practicality. The tripod is also aluminum, providing stable support for the telescope. Optical performance and accessories: 360 mm focal length and 50 mm aperture with transmission coatings for brighter, clearer images. Includes two replaceable eyepieces (20 mm for 18x, 6 mm for 60x) and a 3x Barlow lens to increase viewing power. Eyepiece 1: 20 mm (18x); Eyepiece 2: 6 mm (60x). The Barlow lens multiplies magnification to help locate objects more easily. Applications and suitability: for daytime birding, wildlife watching, and scenery viewing, as well as casual and nighttime observing of the moon, stars, and planets. Suitable for adults and astronomy beginners to explore land and sky. Easy use and portability: Compact and lightweight thanks to aluminum construction, easy to handhold and quick to assemble with no extra tools required. Includes a smartphone holder to record pictures and capture moments for astronomy learning. Use scenarios: Daytime nature outings: birding and wildlife observation with a stable tripod. Night sky sessions: Moon and planetary viewing during clear evenings. Educational and travel use: outdoor learning and smartphoneenabled image capture to document observations.