Top quality 20x40x100 waterproof observation binocular with individual eyepiece focussing designed for long range terrestrial and astronomical observations incorporating oversized bak 4 prisms and a fully broadband multi coated optical system top quality doublet objective lenses supplied with two pairs of eyepieces eyepieces are angled at 45deg offering excellent versatility for both terrestrial and astronomical viewing features carrying handle built in lens hoods and tripod adaptor