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Sunday, April 4, 2010

About Hi can i use +ve meniscus (F=1m) as telescope objective?? Will it work same like Plano/Bi Convex Lens

Hi can i use +ve meniscus (F=1m) as telescope objective?? Will it work same like Plano/Bi Convex Lens ?
I m asking u people bcz i didnt get Plano-Convex in market, I asked Optician to give me +1 Diopt. lens, he gave me that meniscus and said this is +1 Dioptre (F=1000mm). I have 25mm eyepiece tht wil give 40x power
Astronomy & Space - 2 Answers
People's Answers, Critics, Comments, Opinions :
Answer 1 :
Yes, that will work. I've used a similar lens, originally intended as a camera close-up attachment, to construct a Galilean telescope. It's not optimized for that use, so you'll get a bit extra spherical aberration, but considering the amount of chromatic aberration you'll get, that hardly seems to matter.
Answer 2 :
You already have the lens, so why not try it and see? It will work, but it will also show why we don't make telescope's like Galileo's any more
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