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For terrestrial viewing in daytime the extra lens is a good idea. At night for astronomy, the lens uses up valuable light that you need… so you leave the lens out. (And who cares anyway if you are seeing Saturn upside down?)
There must already be at least two lenses in a telescope for it to work, objective and eyepiece. To get an upright image, one needs to replace the positive eyepiece lens with a negative one.
Farside99 over 7 years ago
Yep, that’s what gets the flippedy to do the floppedy back to upright. Hopefully, it magnifies, too.
ghretighoti over 7 years ago
For terrestrial viewing in daytime the extra lens is a good idea. At night for astronomy, the lens uses up valuable light that you need… so you leave the lens out. (And who cares anyway if you are seeing Saturn upside down?)
electricshadow Premium Member over 7 years ago
…and while he’s at it, he can revise the spelling rule for “lens.”
wcorvi over 7 years ago
There must already be at least two lenses in a telescope for it to work, objective and eyepiece. To get an upright image, one needs to replace the positive eyepiece lens with a negative one.
flagmichael over 7 years ago
Another good sight gag!
tom over 7 years ago
It’s made for Australia.
whiteaj over 7 years ago
“lense?”
Germanshepherds4ever over 7 years ago
“LENSE”??? WTF is a “lense”? Stay in school, folks!!!!
awgiedawgie Premium Member over 7 years ago
Why isn’t the word “Peter” also upside down? It’s a small detail, but a detail nonetheless.
WDD over 7 years ago
This is how many years before Lippershey and Galileo?