Mesh diameter: 18mm
Content diameter: 50mm
Broadband multilayer coatings: whole surface of the multilayer coating， has a higher light transmittance， little light loss， image brighter. 3X zoom lens， a focal length of the objective lens extended fold increase. .
Perfect introduction to the Practical telescope Telescope: 90MM large diameter refracting Practical telescope Telescope， suitable for use in entrylevel amateur astronomers， configure two different magnification eyepieces， so you can freely mix， observe objects at different distances and sizes. Builtred dot finder using laser red dot， the greater field of vision， easier to find astronomical position and the target scene. .
8×21 is like a viewfinder， helping you find your target faster and easier.
Perspective: 150
Resolution: 3236 line pairs / mm
Focus area: 4 meters to infinity
Eye size: 12 mm
Refraction setting: ±4
Observation distance: 250 meters
Battery: CR2
Size: 180 × 116 X54 mm