water telescope
telescopically
perspective glass
solar telescope
reflector
astrograph
scopeful
radio observation
telescopical
spyglass
pole
teleotoscope
monoscope
photoheliograph
telescopic
coronograph
telephotometer
refracting telescope
robodoc
telescopist
field glass
Schmidt telescope
phototelescope
speculum
optical telescope
telestereoscope
radiospectrometer
glass
refractor
dioptric
terrestrial telescope
subreflector
longue-vue
reflecting telescope
coronagraph
collimator
telespectrograph
eyehole
spectroheliokinematograph
aquascope
SIGINT
digiscope
telespectroscope
zenith telescope
Herschelian telescope
finderscope
raft
telescopiform
drawtube
monocular