SV40 binoculars with 10× (or 8×) magnification options and objective diameters 42 mm (≈1.65 in) or 32 mm (≈1.26 in). Eyepiece diameter 24 mm (≈0.94 in). Central focus, BK7 prisms, multi-coated optics and a field of view of about 5.8° or 7.2°. Water-resistant to IPX4. Brand: svbony.