Assertion: newtonian telescope | /r/HasProperty | a standard
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Source sentences:
text: Newtonian telescopes are one of the earliest reflector telescope designs and have been a standard ever since thanks to a simple yet effective optical design that allows for short focal lengths and excellent image quality and clarity.
text: Newtonian telescopes are one of the earliest reflector telescope designs and have been a standard ever since thanks to a simple yet effective optical design that allows for short focal lengths and excellent image quality and clarity.