| What
is a "Refractor"? |
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 A
refracting or refractor telescope is a type of optical
telescope which refracts light at each end using lenses.
This refraction causes parallel light rays to converge
at a focal point; while those which were not parallel
converge upon a focal plane. This can enable a user
to view a distant object as if it were brighter, clearer,
and/or larger. These are similar to microscopes. The
monocular is a type of refractor. A typical refractor
has two lenses, an objective lens and an eyepiece lens.
The objective lens has two pieces of glass (with different
densities), "crown" and "flint glass".
Each side of each piece is ground and polished, and
then the two pieces are glued together. The curvatures
are designed to cancel chromatic and spherical aberration. |
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| Telescope
Designs |
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 In
general, there are two kinds of telescope systems.
One is the Optical Telescope. This is our main manufacturing
base. The other is the radio telescope, which is used
for National & Scientific research . We manufacture
only a few of these. |
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more subject related optics.. |
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| Telescope
Reviews |
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| Telescope reviews from our
clients and end users. Please feel free to post your
own comments. |
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| Item No. XWJ |
| 70mm (2.8"), FL=300mm |
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