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 about 7 years ago
Yep, that’s what gets the flippedy to do the floppedy back to upright. Hopefully, it magnifies, too.
ghretighoti about 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 about 7 years ago
…and while he’s at it, he can revise the spelling rule for “lens.”
wcorvi about 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 about 7 years ago
Another good sight gag!
tom about 7 years ago
It’s made for Australia.
whiteaj about 7 years ago
“lense?”
Germanshepherds4ever about 7 years ago
“LENSE”??? WTF is a “lense”? Stay in school, folks!!!!
awgiedawgie Premium Member about 7 years ago
Why isn’t the word “Peter” also upside down? It’s a small detail, but a detail nonetheless.
WDD about 7 years ago
This is how many years before Lippershey and Galileo?