achromatic lens

all-sky camera
all-sky survey
altazimuth mounting
aluminizing
apochromatic lens

astrophotography

Barlow lens
binoculars
Brandon eyepiece

Cassegrain telescope
catadioptric telescope
CCD
comparator
corrector plate
coudé focus

diagonal
Dobsonian telescope

equatorial mounting
eyepiece

field lens
field rotation
flux collector
Foucault knife-edge test

Galilean telescope
grazing-incidence telescope
Gregorian telescope

Hartmann test
Herschelian telescope

image tube
interferometer
Keplerian telescope

Maksutov telescope
meniscus lens

Nasmyth focus
Newtonian telescope
Newtonian-Cassegrain telescope
nulling

objective
occulting disk

primary mirror
prime focus

radio telescope
reflecting telescope
refracting telescope
richest field telescope
Ritchey-Chretien telescope
Ronchi test

Schmidt camera
Schmidt-Cassegrain telescope
secondary mirror
segmented mirror
setting circles
star diagonal

telescope
telescope mounting
transfer lens
transit circle

very long baseline interferometry