Etymology
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Words related to telescope

*kwel- (2)

Proto-Indo-European root meaning "far" (in space or time). Some sources connect this root with *kwel- (1), forming words to do with turning, via the notion of "completion of a cycle."

It forms all or part of: paleo-; tele-; teleconference; telegony; telegraph; telegram; telekinesis; Telemachus; telemeter; telepathy; telephone; telescope; television.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit caramah "the last;" Greek tele "far off, afar, at or to a distance," palaios "old, ancient," palai "long ago, far back;" Breton pell "far off," Welsh pellaf "uttermost."

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*spek- 
Proto-Indo-European root meaning "to observe."

It forms all or part of: aspect; auspex; auspices; auspicious; bishop; circumspect; conspicuous; despicable; despise; episcopal; especial; espionage; espy; expect; frontispiece; gyroscope; haruspex; horoscope; inspect; inspection; inspector; introspect; introspection; perspective; perspicacious; perspicacity; prospect; prospective; respect; respite; retrospect; scope; -scope; scopophilia; -scopy; skeptic; species; specimen; specious; spectacle; spectacular; spectrum; speculate; speculation; speculum; spice; spy; suspect; suspicion; suspicious; telescope.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit spasati "sees;" Avestan spasyeiti "spies;" Greek skopein "behold, look, consider," skeptesthai "to look at," skopos "watcher, one who watches;" Latin specere "to look at;" Old High German spehhon "to spy," German spähen "to spy."
kaleidoscope (n.)

"optical instrument creating and exhibiting, by reflection, a variety of beautiful colors and symmetrical forms," 1817, literally "observer of beautiful forms," coined by its inventor, Scottish scientist David Brewster (1781-1868), from Greek kalos "beautiful, beauteous" (see Callisto) + eidos "shape" (see -oid) + -scope, on model of telescope, etc. They sold by the thousands in the few years after their invention, but Brewster failed to secure a patent.

Figurative meaning "constantly changing pattern" is first attested 1819 in Lord Byron, whose publisher had sent him one of the toys. As a verb, from 1891. A kaleidophone (1827) was invented by English inventor Charles Wheatstone (1802-1875) to make sound waves visible.

scope (n.2)

[instrument for viewing] 1872, shortened from telescope, microscope, etc., in which the element (Latinized) is from Greek skopein "to look" (from PIE root *spek- "to observe"). Earlier used as a shortening of horoscope (c. 1600). Extended to radar screens, etc., by 1945 as a shortening of oscilloscope.