T Astronomical Telescopes, Birdwatching Binoculars, Binoculars for Astronomy, Spotting Scopes, Brass Telescopes, Tripods, Monoculars & Microscopes, Astronomical and Telescope Accessories under the well-known and highly respected Sky-Watcher, Sky-Watcher PRO-SERIES, TAL, Helios, Acuter and Zenith brand names.
Sky-Watcher is a First-Class market leading brand of Telescopes for Astronomy with models available for astronomers of all ages and abilities. A massive range is available, with the following telescope designs:- Newtonian Reflectors, Dobsonians, Maksutov-Cassegrains, Achromatic Refractors & Apochromatic ED Refractors supplied on a variety of Telescope Mountings.
If you are interested in astronomy, you will discover a wealth of information
he complete range of Zenith microscopes is shown here. Telescopes and Microscopes
To enlarge and brighten distant objects, we use telescopes, and to do the
same with nearby objects, we use microscopes. Because these devices are almost identical
in structure, though specialized to apparently different tasks, it’s natural to describe them
together in this section.
Where is the image that you see when you look into a telescope
or microscope? Why does that image often appear upside-down and backward?
How do the eyepieces in telescopes and microscopes contribute to their magnifications?
Why does the image become dimmer as the magnification increases? Is there a limit to a
telescope or microscope’s usable magnification? Why do major telescopes have such large
diameters? What is the advantage to a telescope in space?
Experiments to Do: Building a simple telescope is easy if you have two different magnifying
glasses. You need one with a long focal length (low magnification) and one with a
short focal length (high magnification). Use the long focal length lens to form a real image
on a sheet of paper. Once you know how far from the lens the real image forms, you
can begin looking at that image with the more powerful magnifying glass. But instead of
looking at the real image on the sheet of paper, hold the two lenses up in line with one
another and look right through both. If you look into the high-powered lens and adjust the
separation between the two, you should find a special distance at which you see a clear
image of the scene in front of you. This image will be enlarged, but upside-down and
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The complete range of Helios Roof Prism Binoculars.
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