Orion 9545 Resolux 10.5x70 Waterproof Astronomy Binoculars These rugged 10.5-power Orion Resolux astronomical binoculars provide high-resolution views with a nice flat-field Fully waterproof and nitrogen purged construction prevents lens fogging in damp conditions High-quality BAK-4 prisms and advanced multi-coatings on all optical surfaces provide maximum light throughput for bright views rich in contrast Orion's 10.5x70 Resolux binoculars are still hand holdable for short viewing sessions, and have a nice 5.0 field of view Attachment to a tripod with the included tripod adapter is recommended for extended use. Tripod sold separately