Orion FUNSCOPE Bedienungsanleitung

INSTRUCTION MANUAL

IN 374 Rev. D 02/18

Fu nSc pe

76mm TableTop Reflector Telescope

#10033

Customer Support:

www.OrionTelescopes.com/contactus

Corporate Offices:

89 Hangar Way, Watsonville CA 95076 - USA

Providing Exceptional Consumer Optical Products Since 1975

uct instruction or any of its contents may be reproduced, copied, modified or adapted, with-

out the prior written consent of Orion Telescopes & Binoculars.

Congratulations on your purchase of the Orion FunScope telescope.

Your new FunScope is easy to use and arrives from the factory

almost fully assembled! Only the nder scope and eyepieces need

to be installed. If you have never owned a telescope before, we

would like to welcome you to amateur astronomy. Take some time

to familiarize yourself with the night sky. Learn to recognize the pat-

terns of stars in the major constellations. With a little practice, a little

patience, and a reasonably dark sky away from city lights, you’ll nd

your telescope to be a never-ending source of wonder, exploration,

and relaxation.

These instructions will help you set up and use your FunScope tele-

scope. Please read them thoroughly before getting started. Please

save all original packaging. This will help protect your FunScope if

you wish to transport it or in the unlikely event to need to return it for

repair.

1. Included items

Remove and identify all included items, using the list below for reference.

• FunScope telescope with base

• Red dot nder scope

• 20mm Kellner eyepiece

• 6mm Kellner eyepiece

• 2x Barlow lens

• MoonMap 260

WARNING: Never look directly at the Sun through your

telescope—even for an instant—without a professionally made

solar filter that completely covers the front of the instrument, or

permanent eye damage could result. Young children should use

this telescope only with adult supervision.

2. Getting familiar with the

FunScope's features

1. Optical tube - This is the main component of the telescope. It houses the

76mm-diameter primary mirror at the bottom end and a small secondary

mirror at the front end, which deects light out the side of the optical tube

through the focuser (2).

2. Focuser - This is where the eyepiece (5) is inserted, and how sharpness is

adjusted.

3. Focus wheels - The focus wheels are used to bring objects into focus. By

turning them you move the rack-and-pinion focuser (4) in and out until sharp

focus is achieved.

4. Eyepiece securing thumbscrew - Used to keep the eyepiece (5) secure in the

focuser (2).

5. 20mm eyepiece - The eyepiece is the part of the telescope that you look into

to see things. It magnies the image. Its magnifying power is determined by

Figure 1. Items included with the FunScope.

FunScope

Dust

cover

Red dot

nder

scope

2x Barlow

lens

20mm

eyepiece

6mm

eyepiece

MoonMap

260

the focal length of both the eyepiece

and the telescope. Magnication

is discussed in more detail in the

Using Your Telescope section. The

FunScope comes with two eyepieces:

one has a focal length of 20mm for

low-power views, and the other has a

focal length of 6mm for higher-power

views.

6. Red dot nder scope - A non-magni-

fying sighting device that is used to

locate celestial objects and “aim” the

telescope. It superimposes a tiny LED

red dot on the sky (it is not a laser!),

showing exactly where the telescope

is pointed.

7. Finder scope base - The nder scope

base is attached to the main tele-

scope. To attach the red dot nder

scope to the telescope you simply

slide the bracket of the nder scope

into the base.

8. Altazimuth base - The base provides a stable mounting for the telescope.

Made of wood composite material nished with a water-resistant laminate,

it allows you to easily move the telescope in altitude (up/down) and azimuth

(left/right).

9. Altitude tension knob - This knob couples the optical tube to the vertical

strut of the altazimuth base. It allows you to adjust the amount tension in the

altitude (up/down) motion of the telescope to the desired level.

10. Feet - Three feet provide stability and ground clearance for the FunScope.

They have skid-free rubber grip pads on the underside.

The following items are also included and are shown in Figure 1.

• Dust cover - As its name suggests, the dust cover keeps the internal optics of

the telescope free of dust and other particulate matter when the telescope is not

in use.

• 6mm eyepiece – Used for higher-magnication (50x) viewing.

• 2x Barlow lens - Doubles the magnifying power of any eyepiece it is used in

combination with.

• MoonMap 260 - With over 260 identied craters, mountains, valleys, "seas"

and more, this laminated map can be used to plan what to look at on the Moon,

Figure 2. Key parts of the FunScope.

and to learn the ofcial names of all the interesting lunar landscape features you

see with the FunScope.

3. Getting started

Setup

Your FunScope arrives assembled from the

factory; you just need to install the visual

accessories. These will be found in a box

within the main box.

1. Attach the red dot nder scope (6) to

the optical tube (1) by inserting the

nder scope’s bracket into the nder

scope base (7), as shown in Figure

3, until it clicks. (To remove the nder

scope, press the small tab at the back

of the base and slide the bracket out.)

2. Now you will insert an eyepiece (5) into

the focuser. We recommend starting

with the 20mm eyepiece, which pro-

vides lower power and a wider eld of

view than the 6mm eyepiece. Loosen

the eyepiece securing thumbscrew

(4), then insert the chrome barrel of

the 20mm eyepiece into the focuser

(2) and secure it with the thumbscrew.

It’s best to get a feel for the basic functions of the FunScope during the day,

before observing astronomical objects at night. This way you won’t have to

orient yourself in the dark! Find a spot outdoors where you’ll have plenty of

room to move the telescope, and where you’ll have a clear view of some

object or vista that is at least 1/4 mile away. It is not critical that the telescope

be exactly level, but it should be placed on a relatively at surface to ensure

smooth movement.

The FunScope was designed specically for visual observation of astro-

nomical objects in the night sky. Like all Newtonian reector telescopes, it is

not suited for daytime terrestrial usage because the image in the eyepiece is

rotated (upside-down).

One of the great assets of the FunScope is its extremely portable size. Due

to its overall short height, you will nd that viewing while sitting next to the

telescope is the most comfortable. If you wish to raise the telescope off the

ground so that it can be used while standing or sitting in a chair, then a plat-

form such as a milk crate or table can be used.

Figure 3. Attaching the red dot

scope to the telescope.

Finder scope

base

Altitude and Azimuth

(Aiming the Telescope)

The FunScope altazimuth base (8)

permits motion along two axes:

altitude (up/down) and azimuth

(left/right) (Figure 4). Moving the

telescope up/down and right/left

is the “natural” way people search

for objects; which makes pointing

the telescope intuitive and easy.

Simply grasp the front of the

optical tube and move the tele-

scope left or right so that the base

rotates. Move the optical tube up

or down in the same manner. Both

motions can be made simultane-

ously and in a continuous manner

for easy aiming. This way you can

point to any position in the night

sky, from horizon to horizon. If

the base tips when you are mov-

ing the telescope, just place your

other hand on the base to stabi-

lize it. You may also want to loosen

the altitude tension knob (9) a little.

Focusing the Telescope

With the 20mm eyepiece (5) inserted into the focuser (2) and secured with the

thumbscrew (4), aim the optical tube (3) so the front (open) end is pointing in the

general direction of an object at least 1/4-mile away. With your ngers, slowly

rotate one of the focus wheels (3) until the object comes into sharp focus. Go a little

bit beyond sharp focus until the image starts to blur again, then reverse the rotation

of the knob gradually, until you’ve nailed the exact focus point.

Aligning and Using the Red Dot Finder Scope

The included red dot nder scope (6) (Figure 5) makes pointing your telescope

almost as easy as pointing your nger! It permits easy object targeting prior to

observation in the higher-power main telescope.

Before you can use the red dot nder scope, you must remove the small plastic tab

sticking out from the battery compartment (Figure 5). Doing so will allow the pre-

installed 3V CR-2032 button cell battery to make contact with the nder scope’s

electronic circuitry to power the nder’s red LED illuminator. The tab can then be

discarded.

To use the red dot nder scope properly, it must be aligned with the main tele-

Figure 4. The FunScope has two axes

of motion: altitude (up/down) and azimuth

(left/right).

Altitude

Azimuth

scope. This is easiest to do during daylight hours, before observing at night. Follow

this procedure:

1. First, remove the dust cover from the front of the telescope.

2. With the 20mm eyepiece already installed from step 2 above, point the tele-

scope at a well-dened land target (e.g., the top of a telephone pole) that’s

at least a quarter mile away.

3. Center the target in the eyepiece.

Note: The image in the eyepiece will appear rotated (upside down). This is

normal for reector telescopes.

4. Turn on the red dot nder scope by sliding the power switch to ON (refer to

Figure 5). The “1” position provides dim illumination while the “2” position

provides brighter illumination. Typically the dimmer setting is used under

dark skies and the brighter setting is used under light-polluted skies or in

daylight. Position your eye at a comfortable distance from the rear of the

unit. Look through the rear of the nder scope with both eyes open to see

the illuminated red dot. The target object should appear in the eld of view

Figure 5: The red dot nder scope has vertical and (inset) horizontal adjustment

knobs for aligning it with the telescope.

Power switch

Vertical knob

Horizontal

knob

Plastic tab

somewhere near the red dot.

5. You’ll want to center the target object on the red dot. Without moving the

telescope, use the nder scope’s vertical and horizontal adjustment knobs

(shown in Figure 5) to position the red dot on the object.

6. When the red dot is centered on the distant object, check to make sure the

object is still centered in the telescope’s eyepiece. If it isn’t, re-center it then

adjust the nder scope’s alignment again. When the object is centered in

the telescope eyepiece and on the nder scope’s red dot, the nder scope

is properly aligned with the telescope. The red dot nder scope’s alignment

should be checked before every observing session.

At the end of your observing session, be sure to slide the power switch to OFF to

preserve battery life.

4. Using your telescope

Choosing an Observing Site

When selecting a location for observing, get as far away as possible from direct

articial light such as street lights, porch lights, and automobile headlights. The

glare from these lights will greatly impair your dark-adapted night vision. Avoid

viewing over rooftops and chimneys, as they often have warm air currents rising

from them. Similarly, avoid observing from indoors through an open (or closed)

window, because the temperature difference between the indoor and outdoor air

will cause image blurring and distortion.

If at all possible, escape the light-polluted city sky and head for darker country

skies. You’ll be amazed at how many more stars and deep-sky objects are visible

in a dark sky!

Cooling the Telescope

All optical instruments need time to reach “thermal equilibrium.” The bigger the

instrument and the larger the temperature change, the more time is needed. Allow

at least 20 minutes for your telescope to acclimate to the temperature outdoors

before you start observing with it.

Let Your Eyes Dark-Adapt

Don’t expect to go from a lighted house into the darkness of the outdoors at night

and immediately see faint nebulas, galaxies, and star clusters—or even very many

stars, for that matter. Your eyes take about 30 minutes to reach perhaps 80% of

their full dark-adapted sensitivity. As your eyes become dark-adapted, more stars

will glimmer into view and you’ll be able to see fainter details in objects you view

in your telescope.

To see what you’re doing in the darkness, use a red-ltered ashlight rather than

a white light. Red light does not spoil your eyes’ dark adaptation like white light

does. A ashlight with a red LED light is ideal. Beware, too, that nearby porch,

streetlights, and car headlights will ruin your night vision.

“Seeing” and Transparency

Atmospheric conditions vary signicantly from night to night. “Seeing” refers to the

steadiness of the Earth’s atmosphere at a given time. In conditions of poor seeing,

atmospheric turbulence causes objects viewed through the telescope to “boil.” If

you look up at the sky and stars are twinkling noticeably, the seeing is poor and you

will be limited to viewing at lower magnications. At higher magnications, images

will not focus clearly. Fine details on the planets and Moon will likely not be visible.

In conditions of good seeing, star twinkling is minimal and images appear steady in

the eyepiece. Seeing is best overhead, worst at the horizon. Also, seeing generally

gets better after midnight, when much of the heat absorbed by the Earth during the

day has radiated off into space.

Especially important for observing faint objects is good “transparency”—air free

of moisture, smoke, and dust. All tend to scatter light, which reduces an object’s

brightness. Transparency is judged by the magnitude of the faintest stars you can

see with the unaided eye (5th or 6th magnitude is desirable).

Tracking Celestial Objects

The Earth is constantly rotating about its polar axis, completing one full rotation

every 24 hours; this is what denes a “day”. We do not feel the Earth rotating, but

we see it at night from the apparent movement of stars from east to west. When

you observe any astronomical object, you are watching a moving target. This

means the telescope’s position must be continuously adjusted over time to keep

an object in the eld of view. This is easy to do with the FunScope because of its

smooth motions on both axes. As the object moves off towards the edge of the

eld of view, just lightly nudge the telescope tube to re-center it. Objects appear to

move across the eld of view faster at higher magnications. This is because the

eld of view becomes narrower.

Eyepiece Selection

By using eyepieces of different focal lengths, it is possible to attain many mag-

nications or powers with the FunScope. Your telescope comes with two 1.25"

eyepieces: a 20mm, which gives a magnication of 15x, and a 6mm, which provides

50x magnication. Other 1.25" eyepieces can be purchased to achieve higher or

lower powers. It is quite common for an observer to own ve or more eyepieces

to access a wide range of magnications. To calculate the magnication of a

telescope-eyepiece combination, simply divide the focal length of the telescope by

the focal length of the eyepiece.

Telescope Focal Length (mm)

Eyepiece Focal Length (mm) = Magnication

For example, the FunScope, which has a focal length of 300mm, used in

combination with the 20mm eyepiece, yields a magnication of:

Whatever you choose to view, always start by inserting your lowest-power (longest

focal length) eyepiece to locate and center the object. Low magnication yields a

wide eld of view, which shows a larger area of sky in the eyepiece. This makes

nding and centering an object much easier. Trying to nd and center objects with

a high power (narrow eld of view) eyepiece is like trying to nd a needle in a hay-

stack! Once you’ve centered the object in the eyepiece, you can switch to a higher

magnication (shorter focal length) eyepiece, if you wish. This is recommended for

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

magnications well.

The best rule of thumb with eyepiece selection is to start with a low power, wide-

eld eyepiece, and then work your way up in magnication. If the object looks bet-

ter, try an even higher magnication eyepiece. (You can purchase additional 1.25"

eyepieces, if desired.) If the object looks worse, then back off the magnication a

little by using a lower-power eyepiece.

Magniﬁcation Limits

Every telescope has a useful magnication limit of about 2x per millimeter of aper-

ture. This comes to 152x for the FunScope. Some telescope manufacturers will

use misleading claims of excess magnication, such as “See distant galaxies at

640X!” While such magnications are technically possible, the actual image at that

magnication would be an indistinct blur. Moderate magnications are what give

the best views. It is better to view a small, but bright and detailed image than a dim,

unclear, over-magnied image.

Using the 2x Barlow Lens

The included 2x power-boosting “Barlow” lens (see Figure 1) doubles the magnify-

ing power of any 1.25" eyepiece it is used with. For the FunScope, when you use

the 20mm eyepiece by itself you get a magnication of 15x. But when the 20mm

eyepiece is used in combination with the Barlow lens, the magnication is doubled

to 30x. And when the Barlow is used with the 6mm eyepiece, it yields a magnication

of 100x, instead of 50x without the Barlow.

Simply insert the Barlow lens into your telescope's focuser, and then insert the eye-

piece into the Barlow, gently securing it in place with the thumbscrew on the Barlow

lens (Figure 6). Then, adjust the telescope's focus wheels to enjoy double the mag-

nication of the eyepiece used.

300mm

20mm = 15x

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