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Orion
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Lawn and Garden
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Telescope
Orion
9877 manual
Models:
9877
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Setting up and using an
precise setting
Cleaning
using telescopes or binoculars
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Contents
using telescopes or binoculars
User Guide
OPTICAL VISION LIMITED
Astronomical Telescope
The refractor
Types of Telescope
The catadioptric
EQ-5
Telescopes & Mounts
ALT-AZ ALT-AZ
EQ-2 EQ-1
AZ-3 EQ3-2
Attaching the finderscope
Aligning the finderscope
Telescope basics
Calculating the telescopes magnification
Field of view degrees =
focal length of eyepiece
Magnification = focal length of telescope
Using your telescop e
the concepts contained within it
Page
Page
approximate setting
Polar axis alignment
Setting up and using an
The equatorial mounting
precise setting
altitude alignment
Polar axis alignment
Polar axis elevation
Calibrating the declination circle
The setting circles
Polar axis azimuth alignment
Figure Figure
Using the setting circles
Appendix
telescope
Tips on observing with your
Get to know the sky
that has one
to cover the seven principal stars that delin- eate the figure of Orion
special filters that can almost magically remove the orange cast to the sky created by sodium streetlights revealing a dark, star- studded sky beyond. These filters are not cheap - you can spend £100 quite easily for two for a pair of binoculars - but to the tele- scope user they are almost mandatory for any serious work concerned with hunting for galaxies and faint nebulae
CLEANING
