Binoculars Image-stabilized binoculars Binoculars Building Orion Telescopes & Binoculars Opera glasses Tower viewer Trinovid Swarovski Optik Perger prism Abbe–Koenig prism Porro prism Schmidt–Pechan prism Steiner-Optik Uppendahl prism David Blair (mariner) Globe effect Monocular First World War glass–rubber exchange Vortex Optics Bushnell Corporation Butterfly watching David P. Bushnell Exit pupil Inverted binocular phenomenon Roof prism Explore Scientific Tasco NGC 1027 Finnstick Barr and Stroud NGC 2354 Blaser Lunar observation NGC 2301 A View from a Hill (A Ghost Story for Christmas) NO…

OBLEX E-Optics GmbH Bresser NGC 6939 Shacolas Tower Charles Frank Ltd Porro–Abbe prism Celestron Reginald Robinson Lee Messier 41 Jeffrey Glassberg NGC 1245 Michael Moore (saxophonist and clarinetist) Wingspan (magazine) The Silent Voice (play) Lili Bleeker The Cruise of the Breadwinner Meopta Bishnu Kharghoria NGC 6242 Frederick Fleet James Muirden Okaya Optical Leucorrhinia proxima C/2016 U1 (NEOWISE) Hayneedle Bino Viewing instrument Sub Battle Simula

tor Trongisvágur Leucorrhinia frigida Okaya Glassing (disambiguation) Monopod Star hopping Porro (disambiguation) NGC 6910 Eben Emerson Wray (lenses) Macromia illinoiensis Gamma Canis Minoris Hertel & Reuss Binoviewer C/2012 K1 (PanSTARRS) Progomphus obscurus Sh2-264 Air Commando Rifle Regiments Operation Jumelles Libellula semifasciata Belvederen Bioptics Large Sagittarius Star Cloud Number 37 (film) NGC 4490 Binocular Dragan Babić Spiny baskettail Iota Librae Stalker vision Prism sight Erythrodiplax berenice Aeshna eremita Horrors of the Black Museum Hayward Shoreline Interpretive Center HRT 4 Dora Observatory 99 Ways to Tell a Story: Exercises in Style Euphydryas Melissa blue Paddle-tailed darner Leslie A. McRill Leucorrhinia D