Firefield 20-60x60 SE Spotting Scope Kit (Straight Viewing)
Magnification & Objective Diameter    20-60
Diameter, Objective Lens    60 mm
Type of Prism (type)    Bak-4
Lens Coating    Fully multi-coated CL/FC/BMC/FBMC
Focus System, Cent/Ind/Fix    Central
Focusing Lens, Eye/Obj/Int    Internal
Diameter, Exit Pupil    3.15-1.05 mm
Eye Relief    17-13.5 mm
Field of View    2.1-1.08 angle
Field of View    110-57 ft/1,000yds
Field of View    37-19 m/1,000m
Distance, Minimum Focusing Distance    15/5 ft/m
Relative Brightness    9.9-1.1
Twilight Index    34.6-60
Resolution    4''
Diopter System, location    eyepiece
Range, Diopter    -4 to +8
Waterproof/Nitrogen-filled    yes yes/no
Fog Proof    yes yes/no
IP Rating (waterproof)    IPX6 (weatherproof)
Eyecup system    fold down rubber eyeguard
Tripod Mount, inch    1/4 in
Operating Temperature    0 to 120 F
Dimensions    350mm/145mm/75mm mm
Weight    22.5 oz
Prism Coating, (yes/no)    Yes