Related parameters:                                              
Product name: 8x30 single telescope.
Magnification: 8 times.
Mouth diameter: 30 mm
Visual Angle: 8.3 degrees
Exit pupil diameter: 3.75mm.
Exit pupil distance: 12 mm.
Focus mode: eyepiece focusing.
Focus mode: yes
Material: metal
Film: light blue light purple multilayer broadband film.
Volume: 122x50mm.
Net weight: about 226 grams.
Attached: leather bag, instruction book, etc.