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                             51-0842  51-1042

       SPEC.                                        

01    POWER         8X   10X

02    OBJ. LENS DIA. mm             42mm     42mm

03    TYPE OF PRISM     Type / Material             ★Roof / BaK4       ★Roof / BaK4

04    PRISM COATING   Yes / No               Yes  Yes

05    NUMBER OF LENS        Pieces & Groups                 16 Pcs / 6 Groups 16 Pcs / 6 Groups

06    LENS COATING     Part / Full / Multi          Multi       Multi

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

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

09    EXIT PUPIL DIAMETER  mm               5.4mm    4.16mm

10    EXIT PUPIL DIST.    mm               18.4mm  15.1mm

11    FIELD OF VIEW      Angel            7.6°  6.1°

12                  Ft / 1,000Yds                400Ft / 1000Yds    318Ft / 1000Yds

13                  M / 1,000M           133M / 1000M      106M / 1000M

14    CLOSE FOCUS DISTANCE    M / Ft.    米/尺             2M / 6.56Ft    2M / 6.56Ft

15    RELATIVE BRIGHTNESS                             29.16      17.31

16    TWILIGHT INDEX                        18.33      20.49

17    RESOLUTION                            

18    DIOPTER SYSTEM         ★Right Ocular      ★Right Ocular

19    DIOPTER COMP.    ± Optic Degree                 ± 4 DIOPTER  ± 4 DIOPTER

20    INTERPUPILLARY DIST  mm               56mm to 76mm    56mm to 76mm

21    ZOOM SYSTEM     Type & Location    线性或分段           No   No

22    WEATHER PROOF        Yes / No               Yes  Yes

23    WATER PROOF     Depth / Time               Yes  Yes

24    NITROGEN FILLED        Yes / No               Yes  Yes

25    FOLDING EYECUPS      Yes / No               No   No

26    POUCH  Yes / No-Mat'l.            Yes / Nylon    Yes / Nylon

27    STRAP    Yes / No-Mat'l.            Yes / Nylon    Yes / Nylon

28    CLEANING CLOTH        Yes / No               Yes  Yes

29    SILICA GEL     Yes / No               Yes  Yes                                    

30    UNIT DIMENSION  mm                    132X59X133 mm  132X59X128mm

31    UNIT WEIGHT  gm / oz.                     743 g      760 g

32    GIFT BOX SIZE mm                          

33    INNER CARTON  Pieces / Size   只数及尺寸                 

34    PIECES PER CARTON  Pieces                         

35    SHIPPING CARTON     Size                     

36    GROSS WEIGHT   Kg. / Pound                       

37    NET WEIGHT        Kg. / Pound