Orion 8 EQ Bedienungsanleitung PDF herunterladen (Seite 15)

a 25mm, which gives a magnification of 40x, and a 10mm,

which gives a magnification of 100x. Other eyepieces can be

used to achieve higher or lower powers. It is quite common for

an observer to own five or more eyepieces to access a wide

range of magnifications. This allows the observer to choose

the best eyepiece to use depending on the object being

viewed. At least to begin with, the two supplied eyepieces will

suffice nicely.

Whatever you choose to view, always start by inserting your

lowest power (longest focal length) eyepiece to locate and

center the object. Low magnification yields a wide field of

view, which shows a larger area of sky in the eyepiece. This

makes acquiring and centering an object much easier. If you

try to find and center objects with high power (narrow field of

view), it’s like trying to find a needle in a haystack!

Once you’ve centered the object in the eyepiece, you can

switch to higher magnification (shorter focal length eyepiece),

if you wish. This is especially recommended for small and

bright objects, like planets and double stars. The Moon also

takes higher magnifications well.

Deep-sky objects, however, typically look better at medium or

low magnifications. This is because many of them are quite

faint, yet have some extent (apparent width). Deep-sky

objects will often disappear at higher magnifications, since

greater magnification inherently yields dimmer images.This is

not the case for all deep-sky objects, however. Many galaxies

are quite small, yet are somewhat bright, so higher power may

show more detail.

The best rule of thumb with eyepiece selection is to start with

a low power, wide field, and then work your way up in magnifi-

cation. If the object looks better, try an even higher

magnification. If the object looks worse, then back off the

magnification a little by using a lower power eyepiece.

What to Expect

So what will you see with your telescope? You should be able

to see bands on Jupiter, the rings of Saturn, craters on the

moon, the waxing and waning of Venus, and possibly hun-

dreds of deep sky objects. Do not expect to see as much color

as you in NASA photos, since those are taken with long-expo-

sure cameras and have “false color” added. Our eyes are not

sensitive enough to see color in deep-sky objects except in a

few of the brightest ones.

Remember that you are seeing these objects using your own

telescope with your own eyes! The object you see in your eye-

piece is in real-time, and not some conveniently provided

image from an expensive space probe. Each session with

your telescope will be a learning experience. Each time you

work with your telescope it will get easier to use, and stellar

objects will become easier to find. Take it from us, there is big

difference between looking at a well-made full-color NASA

image of a deep-sky object in a lit room during the daytime,

and seeing that same object in your telescope at night. One

can merely be a pretty image someone gave to you.The other

is an experience you will never forget!

A. The Moon

With is rocky and cratered surface, the moon is one of the

most interesting and easy subjects for your scope. The best

time to view it is during its partial phases when shadows fall

on the craters and canyon walls to give its features definition.

While the full moon may look like a tempting target, it is actu-

ally the worst time for viewing! The light of a full moon is too

bright and lacks any decent surface definition.

Use an optional Moon filter to dim the Moon when it is very

bright. It simply threads onto the bottom of the eyepiece from

the focuser (you must first remove the eyepiece from the

focuser to attach the filter).You’ll find the Moon filter improves

viewing comfort, and helps bring out the subtle features if the

lunar surface.

B. The Sun

You can change your nighttime telescope into a daytime Sun

viewer by installing an optional full-aperture solar filter over

the front opening of a SkyView Pro 8 EQ. The primary attrac-

tion is sunspots, which change shape, appearance, and

location daily. Sunspots are directly related to magnetic activi-

ty in the Sun. Many observers like to make drawings of

sunspots to monitor how the Sun is changing from day to day.

Important Note: Do not look at the Sun with any optical

instrument without a professionally made solar filter, or

permanent eye damage could result. Also, be sure to

cover the finder scope, or better yet, remove it altogether.

C. The Planets

The planets don’t stay put like the stars, so to find them you

should refer to Sky Calendar at our website telescope.com, or

to charts published monthly in Astronomy, Sky & Telescope,

or other astronomy magazines. Venus, Mars, Jupiter, and

Saturn are the brightest objects in the sky after the Sun and

the Moon. Your SkyView Pro 8 EQ is capable of showing you

these planets in some detail. Other planets may be visible but

will likely appear starlike. Because planets are quite small in

apparent size, optional higher power eyepieces are recom-

mended and often needed for detailed observations. Not all

the planets are generally visible at any one time.

JUPITER The largest planet, Jupiter, is a great subject for

observation.You can see the disk of the giant planet and watch

the ever-changing positions of its four largest moons - Io,

Callisto, Europa, and Ganymede. Higher power eyepieces

should bring out the cloud bands on the planet’s disk.

SATURN The ringed planet is a breathtaking sight when it is

well positioned.The tilt angle of the rings varies over a period of

many years; sometimes they are seen edge-on, while at other

times they are broadside and look like giant “ears” on each side

of Saturn’s disk. A steady atmosphere (good seeing) is neces-

sary for a good view.You will probably see a bright “star” close

by, which is Saturn’s brightest moon, Titan.

VENUS At its brightest, Venus is the most luminous

object in the sky, excluding the Sun and the Moon. It is

so bright that sometimes it is visible to the naked eye

during full daylight! Ironically, Venus appears as a thin

crescent, not a full disk, when at its peak brightness.

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