Quote:
Originally Posted by Merlin66
Dwight,
You need to measure the focal length of the barlow before you can calculate the magnification.
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I just realized that I will have to put a lens in the DIY tube in order for it to be an effective Barlow Lens. Right now the tube is nothing more than an extension tube.
Does anyone know of any good Barlow Lens and where I can purchase them from?
The overall length of the tube is 5 1/2 "
I would have to take a guess, but the focal length of the DIY would the length between the bottom eyepiece lens to the eyepiece in the Barlow.
The length between the eye piece and the Barlow lens will eventually be five inches.