Here’s a superlative pair of Zeiss 15x60B/GAT* binoculars. No longer in theory, but in reality, these are the most efficient medium powered field binoculars for hunting or astronomy. They deliver a razor sharp and generously bright symbol with very prime contrast. Simply a surprising piece of German lead glass greatness that no person has ever regretted shopping for. *2 weeks a reimbursement no questions.