Orion STARBLAST Manual de usuario

Orion StarBlast 4.5" Telescope

INSTRUCTION MANUAL

WARNING: Never look directly at the Sun through any telescope or its finder scope —

even for an instant — as permanent eye damage could result. Do not point the telescope

at the Sun, as parts will melt! Children should use this telescope only with adult

supervision.

This telescope was donated to the Rochester Public Library by

the Rochester Astronomy Club which is also providing the library

with ongoing support in education and maintenace.

We hope you enjoy using the telescope.

The RAC is a 501(c)(3) non-profit educational organization,

promoting public awareness of astronomy. We hold public sky viewing events,

presentations and discussions, all free of charge.

Go to http://rochesterskies.org/ for

a calendar of events, newsletters, links to online resources,

members forum and information about monthly club meetings,

star parties and public outreach events.

You can contact the club about this telescope by emailing us at

[email protected]g.

www.rochesterskies.org

507-328-2309

Care and Maintenance

You will have the best experience with the telescope if you only turn the knobs marked with yellow.

Do not turn or adjust any other knobs or screws.

Do not attempt to clean the eyepiece lense and mirrors. The librarians looked at them when the

telescope was brought back by the last library patron and cleaned them if necessary.

The best way to care for the telescope is to treat it like a child:

-Use a seat belt to secure it when transporting in your vehicle.

-Never grab it by the “throat” (the eyepiece or focuser); always hold it by the handle and the base.

-Don’t poke your ﬁngers in the “eyes” (the eyepiece or anything glass or mirrored).

-Don’t even clean the “eyes”.

-Don’t try to be a doctor. If something doesn’t seem right, take the telescope back to the library or

If you would like to find out if any Rochester Astronomy Club members are going to get

together to go observing, go to http://rochesterskies.org/forums/ and look at the thread

“Observing Tonight?” and go to the last page.

You will see fainter objects when your eyes are dark adapted, which typically takes about

20 minutes. Exposure to white light will ruin your dark adaptation in a few seconds! Use

the red headlamp in the storage bag on the telescope when looking at printed material or

charts to preserve your night vision.

* * * * * * * * * * * *

We would like to thank the New Hampshire Astronomical Society which came up with the

adaptations to make the StarBlast telescope suitable for use as a library loaner scope and

has placed many of them in libraries across New Hampshire.

naked eye view

view through StarBlast

Helpful Hints

You will use the telescope more easily if you

practice with it in the daytime so that you are

familiar with its parts and how it operates.

Reflector telescopes like the StarBlast show an

upside down view as shown below.

Telescope Parts

altitude

knob

moon

port

cover

telescope

dust cap

EZ Finder

accessory

bag

handle

telescope

tube

moon

map

focuser

wheels

zoom

eye piece

with

dust cap

How to use the StarBlast Telescope

-Sit the telescope on a surface such as a picnic table or sturdy chair (may need to kneel).

-Remove the dust caps from the end of the telescope tube and the zoom eyepiece.

-If viewing the moon, push out the moon port in the tube dust cover and then put the dust

cover back on the end of the tube.

-Turn the zoom eyepiece to 24. (See next two pages re: eyepiece & EZ Finder.)

-Turn on the EZ ﬁnder. Look through it and turn the scope until the red dot in the round

window seems to touch the object in the sky that you want to look at. The altitude clamp

should be loose enough so the scope can be moved up or down but doesn’t drop on its own.

-Turn the focuser wheel until the object is sharply focused.

-Try turning the zoom eyepiece to a smaller number to increase the magniﬁcation of the

object - you may need to adjust the focus as you change the magniﬁcation.

If dew settles on the eyepiece, do not try to wipe it off since you are likely to damage the

special coatings on it. Instead, wrap your hands around it without touching the glass for a few

minutes and that may warm it up enough to clear the dew.

When you are done observing for the night -

-Turn off the EZ Finder.

-Put the dust caps back on the end of eyepiece and telescope tube (and moon port).

-Replace items removed from the accessory bag. (Constellations book, manual, headlamp)

Detail of EZ Finder

•The ﬁnder is off when the “<” shape on the

yellow wheel is pointed toward the yellow

triangle labeled “OFF” as in the photo to the

right.

•Turn the yellow wheel clockwise to turn it on.

The intensity of the dot is controled by how much

you turn this wheel. Use the dimmest setting that

allows you to see the dot.

•When the ﬁnder is turned on, put your face close to the telescope

tube over the moon map and look through the ﬁnder wth both

eyes open.

•You should see a small red dot as shown in the picture to the left.

If you don’t see the dot, adjust the position of your head, moving

slightly side to side or up and down. You need to be looking at it

fairly straight on.

Detail of Focuser

•Turn either of the two wheels on

the focuser (centers are yellow).

•Each zoom setting of the

eyepiece requires a slightly

different focus.

•Each person may need a

different focus setting.

•If you wear glasses, try using

them when you first look into

the eyepiece, but you may find

that you don’t need to use them.

Detail of Zoom Eyepiece

•The zoom eyepiece has a range of focal

lengths from 8 to 24 mm.

•The white triangle indicates the setting.

•When starting to find an object, begin

with the eyepiece set at 24. Twist the

eyepiece to change the magnification.

When the eyepiece is set on a larger number, you

will see a larger area of the sky at a lower

magnification. Likewise, if it is set on a lower

number, you are seeing a smaller area of the sky

at a higher magnification. Be aware that at

higher magnifications, objects will drift out of

view faster due to the rotation of the earth.

off position

What to Observe

Go to the Library Telescope tab at rochesterskies.org for links to resources to help you find

these objects. The Constellations book in the pack attached to the telescope can help you

identify the constellations in which the objects are located.

The Moon

The moon is an easy and interesting object to observe. There is a simple moon map on the

telescope tube. For the best views, observe when it is well above the horizon. The best

time to observe is when it is in a partial phase, not full. The best place to observe is along

the “line” between the dark and sunlit portions of the moon’s disk, called the terminator.

The Planets

The planets are moving in their orbits all the time as is the earth, so their positions in the

sky are slowly changing. You will need to refer to a current sky chart to find them.

Stars

A telescope can help you see color differences in stars as well as multiple stars. Mizar, the

middle star in the handle of the Big Dipper, is a double star. Albireo in the constellation

Cygnus is a pretty double star, each a slightly different color. Defocusing slightly can help

the color become more apparent.

Deep Sky Objects

If the sky is relatively free of light pollution, you may be able to see galaxies and star

clusters.

Atmospheric Conditions

Seeing - steadiness of the atmosphere

- judged by amount of star twinkling

- best overhead, worst at the horizon

- in good seeing, star twinkling is minimal and

images appear steady in the eyepiece.

Transparency - clarity of atmosphere

- judged by the faintest objects visible naked eye

- bad transparency caused by moisture, smoke and

dust in the atmosphere

- bad transparency scatters light making objects

look dimmer

If seeing is bad but transparency is good = better views of faint objects like galaxies.

If transparency is bad but seeing is good = better views of bright objects like planets.

Transparency is good if Megrez is visible.

WARNING: Never look directly at the Sun through any telescope or its finder scope —

even for an instant — as permanent eye damage could result. Do not point the telescope

at the Sun, as parts will melt! Children should use this telescope only with adult

supervision.

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