WAchromatic telescope
WAerial telescope
WArgunov–Cassegrain telescope
WBalloon-borne telescope
WCassegrain Nasmyth
WCassegrain reflector
WCatadioptric system
WCrossed Dragone
WDobsonian telescope
WGraphic telescope
WGreat refractor
WHeliometer
WHelioscope
WInfrared telescope
WKlevtsov–Cassegrain telescope
WLiquid-mirror telescope
WLurie–Houghton telescopeWMaksutov telescope
WMeniscus corrector
WNasmyth telescope
WNewtonian telescope
WOptical membrane
WOptical spectrometer
WReflecting telescope
WRefracting telescope
WRitchey–Chrétien telescope
WRobotic telescope
WSchiefspiegler
WSchmidt camera
WSchmidt–Cassegrain telescope
WSchmidt–Newtonian telescope
WSolar tower (astronomy)
WSpace telescope
WSpectrohelioscope
WSun Gun Telescope
WThree-mirror anastigmatWZenith telescope