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telescope
A telescope is an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. The first known practical telescopes were refracting telescopes invented in the Netherlands at the beginning of the 17th century, by using glass lenses. They were used for both terrestrial applications and astronomy.
The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. The word telescope now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors.
Bought this with the intention of using it but I like my Dob much better. It's a classic Celestron C5 with the original tripod. Must pick up in Gresham. 550 obo
Open to trades
Big Day today!
You probably didn't know this about me, but I am a bit of a nerd! (If you didn't, you haven't been paying attention!). Had relative in Florida and spent a lot of time around NASA in central FL. What's big news down there is fairly unknown elsewhere.
But today NASA will be...
WTB 8" or 10" dob or cassegrain telescope. I have parts to trade or can buy cash out right. I already have a 6" so nothing smaller than 8" please otherwise you're wasting both our time. Let me know what you have.
For sale or trade, this prime condition Swarovski spotting scope, model AT-80, with Swarovski variable eye piece 20-60x. Includes factory "stay on bag" for convenience & protection.
Includes quick-detach style camera/tripod mounting plate.
$1600 cash or trade for spot price of1-oz Silver...