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Charlie

charlie

By charlie
in Telescopes

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charlie Newbie

charlie

Posted
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Hi, I am trying to build a refractor telescope with an upright image. I have used a biconvex 50mm diameter lens with 1000mm focal point for the objective lens, and a biconcave 50mm diameter lens with 50mm focal point for the eye piece. I think it should be about 20x magnification. It's about 1 meter to focus. The problem I am having is that it is like looking through a pin hole or down an extremely long tunnel. 90 percent of what I see is the inside of the scope. It magnifies really well at the image circle tho. How would I make the image circle bigger? Not zoomed in any more than it is, but rather get rid of seeing the inside of the scope and getting closer to the image circle.

 

Any help would be much appreciated!

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  • 2 weeks later...
RT65CB-SWL Rookie

RT65CB-SWL

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Posted

Hi @charlie and welcome to BYA.org 

 

I have to ask... what is it going to be used for observing/viewing? and what is going to be mounted on?

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