A good telescope of a high-quality brand uses strictly inspected optical glass and high-level optical processing. It is an excellent choice to enjoy the outdoors. And some small manufacturers use some substandard optical glass, or even ordinary glass or resin lenses to assemble, the products have not been strictly debugged, they are fake and inferior products, attracting customers with low prices, so that customers be violated.

MODELS SPEC.                   8x42/10x42                  

01    POWER  8x    10x

02    OBJ.LENS DIA. mm       φ42mm 

03    TYPE OF PRISM     Type / Material      类别及材料    BK7

04    PRISM COATING   Yes / No 是或否    yes 

05    NUMBER OF LENS        Pieces & Groups   6pieces4groups    

06    LENS COATING     CL/FC/BMC/FBMC        BMC      

07    FOCUS SYSTEM     Cent. / Ind. / Fix    Cent.     

08    FOCUSING LENS   Eye. / Obj. / Int.     Int.  

09    EXIT PUPIL DIAMETER  mm        4.9   4.0

10    EXIT PUPIL DIST.    mm        18.5 15

11    FIELD OF VIEW      ANGLE   7°    5.6°

12                  Ft/1,000Yds           369ft       294ft

13                  M/1,000M             123m      98m

14    MIN. FOCAL LENGTH   M / Ft.    米 / 尺  2m/6ft    2m/6ft

15    RELATIVE BRIGHTNESS        24    16

16    TWILIGHT INDEX          18.3 20.5

17    RESOLUTION        ≤5.5″    

18    DIOPTER SYSTEM         Right Eyepiece     

19    DIOPTER COMP.           + - Optic.Degree        ±3  

20    INTERPUPILLARY DIST. mm        56mm~74mm      

21    ZOOM SYSTEM     Type & Location                 

22    WEATHER PROOF        Yes / No        yes 

23    WATER PROOF     Depth / Time        1.5m/3 min   

24    NITROGEN FILLED        Yes / No        yes 

25    EYECUPS SYSTEM        Rubber/Pop-up/Twist-up           Twist-up

26    POUCH  Yes / No - Mat'l.           yes 

27    STRAP    Yes / No - Mat'l.           yes 

28    CLEANING CLOTH Yes / No        yes 

29    SILICA GEL     Yes / No        yes                                           

30    UNIT DIAMENSION  mm          155x135x55mm    

31    UNIT WEIGHT  gm / oz.            650g      

32    GIFT BOX SIZE      mm              

33    PIECES PER INNER CARTON      Pieces / Size               

       INNER CARTON SIZE                       

34    PIECES PER SHIPPING CARTON        Pieces            10pcs     

35    SHIPPING CARTON SIZE     Size cm         

36    GROSS WEIGHT   Kg. / Pound                

37    NET WEIGHT        Kg. / Pound