Answer: spyglasses

AnswerCrossword Clue
SPYGLASSESCollapsible telescopes
SPYGLASSESCrow's-nest telescopes
SPYGLASSESSmall telescopes
SPYGLASSESCrow's-nest instruments
spyglassesSPYGLASS, a small telescope
spyglassesA small hand-held telescope