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TELESCOPES TIPS
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6
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FRONT PAGE
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TELESCOPES & ASTRONOMY
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BACKYARD VIEWING
FAINT OBJECTS
CARROTS
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CONTENTS
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FAINT OBJECTS
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The ability to see faint objects like galaxies or planetary nebulae in best detail depends on
on how much light can be gathered and how much stray light
from other sources can be kept
out. eg. street lights. When viewing diffuse nebulae like the Orion Nebulae, the brighter
you can make the object, the more it
will fill up the whole eyepiece with detail. If the Orion
Nebulae is viewed from the city, where there is lots of light pollution, the object may only
take up a
the center of the eyepiece. If the Orion Nebulae is viewed from a site where there
is no light pollution, it's hard to find an eyepiece with enough wide field
to fit it all in! The following
faint object tips can be used in
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TIP LINKS:
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TELESCOPE
IMPROVEMENTS
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GENERAL
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PLANETS
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conjunction with the
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general tips.
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ADVANCED
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The Telescope
Use cardboard to extend the tube of the telescope. This will cut out any stray light which
hits the lens or secondary mirror from anywhere but the
direction the telescope is pointed.
It doesn't really matter how long you make the extension, but the telescope must be rebalanced
if the addition weighs
anything.
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If there is a gap at the mirror end of your reflector where light can get in, put cardboard or
material around the gap.
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When Observing
A black piece of material put over your head and the eyepiece together will keep you
dark adapted.
CARROTS
Carrots contain vitamin A. If you have a deficiancy of this vitamin it will effect the way
you can see in the dark. Most vitamins we have to much of pass
straight through our bodies,
but vitamin A can be overdosed on. So don't buy a jar of Vitamin A and O.D.!
Eyepieces
The lower the magnification of an eyepiece, the wider the field. There
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are eyepieces available which are 40mm in focal length
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(dimensions).
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40mm eyepieces do not suit all telescopes, so ask us first. Other eyepieces have many
pieces of glass in them to enhance the field of view double that of a
standard eyepiece of
the same focal length.
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FRONT PAGE
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CONTENTS
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Contact Us - telescopes@adam.com.au
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