This is the birdwatching set that provides you with everything needed for an afternoon of observing and documenting feathered friends. The binoculars’ multi-coated 40mm objective lenses provide optimal light gathering while a central focusing knob grants 8X magnification from its BaK-4 glass Porro prism system, yielding a field of view of 365' at 1,000 yards. The binoculars’ have a minimum focus distance of 14', an eye relief of 14 mm, and an exit pupil diameter of 5 mm. Ideal for birding due to their lightweight and versatile portability, the binoculars also come with an educational birding DVD, a field log, and a carrying case. 10" W x 8" L x 4" H. (2 lbs.)