operating telescope

operating telescope

a magnifying lens that gives low magnification and a wide field of vision.
References in periodicals archive ?
For six months, the Plaskett was the largest operating telescope in the world.
The event lasted less than a minute, but that was long enough for researchers operating telescopes in Chile and Brazil to use the star as a backlight to obtain new, more accurate measurements of Charon's radius, density, and atmosphere.
We are also looking at offering a support service for organisations already operating telescopes.
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