Giant 70mm objectives gather a serious amount of light (twice as much as 50mm objectives)- so these are ideal for astronomy. In fact we consider the 11×70 to be the largest and most-powerful binocular that can be hand-held for astronomical viewing. They are also excellent for nautical applications and surveillance. Includes our latest low-reflection broadband multi-coatings, for highest-possible light transmission. Light loss due to reflection and scattering is minimized, providing the highest level of efficiency possible. The view is very close to Fujinon FMT-SX series quality, for a fraction of the price. New “slow-focus” provides precise focus control that won’t drift. Both offer long eye relief (especially the 11x model), so they work well with eyeglasses (the rubber eyecups fold down). All Oberwerk binoculars have rugged rubber-armored metal bodies, all-glass lenses, right ocular diopter adjustment, brass 1/4-20 tripod adapter threading, case, caps, and our premium heavy-duty strap. Truly an incredible value for only $149.95.