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ORION TELESCOPES & BINOCULARS AstroView 90mm EQ 9024, Инструкция по эксплуатации, Страница: 14 / 16

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ter another guide star on the eyepiece’s crosshairs. Once the 
object is centered in the camera, and a guide star is centered 
in the eyepiece, you’re ready to shoot.

Deep-sky objects are quite faint, and typically require expo-
sures on the order of 10 minutes. To hold the camera’s shut-
ter open this long, you will need a locking shutter release 
cable . You will also need to set the camera’s shutter to the 
“B” (bulb) setting for the locking shutter release to work 
properly. Depress the release cable and lock it. You are now 
exposing your first deep-sky object.

While exposing through the camera lens, you will need to 
monitor the accuracy of the mount’s tracking by looking 
through the illuminated reticle eyepiece in the main tele-
scope. If the guide star drifts from its initial position, then use 
the hand controller of the motor drive to “bump” the guide 
star back to the center of the crosshairs. The hand control-
ler only moves the telescope along the R.A. axis, which is 
where most of the corrections will be made. If the guide star 
appears to be drifting significantly along the Dec. axis, then 
the mount’s slow-motion control cables can be carefully used 
to move the guide star back onto the crosshairs. Any drifting 
along the Dec. axis is due to imprecise polar alignment. If the 
drifting is significant, you may need to polar align the mount 
more accurately.

When the exposure is complete, unlock the shutter release 
cable and close the camera’s shutter. 

Astrophotography can be enjoyable and rewarding, as well 
as frustrating and time-consuming. Start slowly and consult 
outside resources, such as books and magazines, for more 
details about astrophotography. Remember . . . have fun! 

8. Terrestrial Viewing

The AstroView 90 may also be used for long-distance view-
ing over land. For this application we recommend substitu-
tion of an Orion 45° Correct-Image Diagonal for the 90° star 
diagonal that comes standard with the telescope. The cor-
rect-image diagonal will yield an upright, non-reversed image 
and also provides a more comfortable viewing angle, since 
the telescope will be aimed more horizontally for terrestrial 
subjects. 

For terrestrial viewing, it’s best to stick with low powers of 
50x or less. At higher powers the image loses sharpness and 
clarity. That’s because when the scope is pointed near the 
horizon, it is peering through the thickest and most turbulent 
part of the Earth’s atmosphere. 

Remember to aim well clear of the Sun, unless the front of 
the telescope is fitted with a professionally made solar filter 
and the finder scope is covered with foil or some other com-
pletely opaque material. 

9. Care and Maintenance

If you give your telescope reasonable care, it will last a 
lifetime. Store it in a clean, dry, dust-free place, safe from 
rapid changes in temperature and humidity. Do not store the 

telescope outdoors, although storage in a garage or shed is 
OK. Small components like eyepieces and other accessories 
should be kept in a protective box or storage case. Keep the 
cap on the front of the telescope when it is not in use. 

Cleaning the Tube

Your AstroView 90 telescope requires very little mechanical 
maintenance. The optical tube is aluminum and has a smooth 
painted finish that is fairly scratch-resistant. If a scratch does 
appear on the tube, it will not harm the telescope. If you 
wish, you may apply some auto touch-up paint to the scratch. 
Smudges on the tube can be wiped off with a soft cloth and a 
household cleaner such as Windex or Formula 409. 

Cleaning Lenses

Any quality optical lens cleaning tissue and optical lens 
cleaning fluid specifically designed for multi-coated optics 
can be used to clean the AstroView’s objective lens or the 
exposed lenses of your eyepieces or finder scope. Never 
use regular glass cleaner or cleaning fluid designed for eye-
glasses. Before cleaning with fluid and tissue, blow any loose 
particles off the lens with a blower bulb or compressed air. 
Then apply some cleaning fluid to a tissue, never directly 
on the optics. Wipe the lens gently in a circular motion, then 
remove any excess fluid with a fresh lens tissue. Oily fin-
gerprints and smudges may be removed using this method. 
Use caution; rubbing too hard may scratch the lens. For the 
large surface of the objective lens, clean only a small area at 
a time, using a fresh lens tissue on each area. Never reuse 
 tissues. 

10. Specifications

Optical tube: Seamless aluminum

Objective lens: Achromatic doublet, air spaced, optical glass 
elements

Objective lens coatings: Fully coated with multi-coatings 

Objective lens diameter: 90mm (3.5") 

Focal length: 910mm

Focal ratio: f/10

Eyepieces: 25mm and 10mm Sirius Plössls, fully coated with 
multi-coatings, 1.25"

Magnification: 36x (with 25mm), 91x (with 10mm)

Focuser: Rack and pinion

Diagonal: 90° Star diagonal, mirror type, 1.25"

Finder scope: 6x Magnification, 30mm aperture, achromatic, 
crosshairs

Mount: EQ-2 German-type equatorial

Tripod: Aluminum

Motor drive: Optional

Weight: 24 lbs.

Содержание AstroView 90mm EQ 9024

Страница 1: ...l Consumer Optical Products Since 1975 Customer Support 800 676 1343 E mail support telescope com Corporate Offices 831 763 7000 P O Box 1815 Santa Cruz CA 95061 Orion AstroView 90mm EQ 9024 Equatorial Refracting Telescope INSTRUCTION MANUAL ...

Страница 2: ...weight shaft Counterweight Latitude locking T bolt Azimuth lock knob Accessory tray bracket attachment point Tripod leg lock knob Piggyback camera adapter Tube mounting rings Finder scope bracket Finder scope Alignment screws 2 Eyepiece Star diagonal Focus knob Dec slow motion control R A setting circle Latitude adjustment T bolt Accessory tray bracket Accessory tray ...

Страница 3: ...g the screws installed in the tops of the tripod legs Remove the screw from the leg line up the holes in the top of the leg with the holes in the base of the mount and reinstall the screw so it passes through the leg and the mount Make sure that a washer is between the screw head and the tripod leg and between the wingnut and tripod leg Tighten the wingnuts only finger tight for now Note that the ...

Страница 4: ...the counterweight with one hand and thread the shaft into the equatorial mount at the base of the declination axis with the other hand When it is threaded as far in as it will go position the counterweight about halfway up the shaft and tighten the counterweight lock knob 9 Attach the two tube rings to the equatorial head using the screws that come installed in the bottom of the rings First remove...

Страница 5: ...ping one hand on the telescope optical tube loosen the R A lock knob Make sure the Dec lock knob is locked for now The telescope should now be able to rotate freely about the R A axis Rotate it until the coun terweight shaft is parallel to the ground i e horizontal 2 Now loosen the counterweight lock knob and slide the weight along the shaft until it exactly counterbalances the telescope Figure 3a...

Страница 6: ...ght which it normal for telescopes that utilize a star diagonal Once the target object is centered on the crosshairs of the finder scope look again in the main telescope s eyepiece and see if it is still centered there as well If it isn t repeat the entire process making sure not to move the main telescope while adjusting the alignment of the finder scope The finder scope is now aligned and ready ...

Страница 7: ...ndo the polar alignment The tele scope should be moved only about its R A and Dec axes Use of the R A and Dec Slow Motion Control Cables The R A and Dec slow motion control cables allow fine adjustment of the telescope s position to center objects within the field of view Before you can use the cables you must manually slew the mount to point the telescope in the vicinity of the desired target Do ...

Страница 8: ...apply to viewing in the Southern Hemisphere The Dec setting circle is scaled in degrees with each mark representing 1 increments Values of Dec coordinates range from 90 to 90 The 0 mark indicates the celestial equator When the telescope is pointed north of the celestial equator values of the Dec setting circle are positive and when the telescope is pointed south of the celestial equator values of ...

Страница 9: ...e R A axis until the coun terweight shaft is horizontal parallel to the ground Then loosen the Dec lock knob and rotate the telescope until it is pointing straight overhead The counterweight shaft is still horizontal Then retighten both lock knobs Similarly to point the telescope directly south the counter weight shaft should again be horizontal Then you simply rotate the scope on the Dec axis unt...

Страница 10: ...th red cellophane or paper Beware too that nearby porch lights streetlights and car headlights will ruin your night vision Aiming the Telescope To view an object in the main telescope first loosen both the R A and Dec lock knobs Aim the telescope at the object you wish to observe by eyeballing along the length of the telescope tube or use the setting circles to dial in the object s coordinates The...

Страница 11: ... craters on the Moon the waxing and waning of Venus and possibly hundreds of deep sky objects Do not expect to see color as you do in NASA photos since those are taken with long exposure 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 ...

Страница 12: ...rving skills get sharper you will be able to dis cern more subtle details Remember that the higher the magnification you use the dimmer the image will appear So stick with low power when observing deep sky objects because they re already very faint How to Find Interesting Celestial Objects Starhopping Star hopping as it is called by astronomers is perhaps the simplest way to hunt down deep sky obj...

Страница 13: ...amera adapter with eyepiece inside to the T ring Insert the whole system into the telescope s focuser drawtube and secure firmly with the thumbscrew Aim the telescope at the planet or Moon you wish to shoot The image will be highly magnified so you may need to use the finder scope to center it within the camera s viewfinder Turn the motor drive on Adjust the telescope s focuser so that the image a...

Страница 14: ...rbulent part of the Earth s atmosphere Remember to aim well clear of the Sun unless the front of the telescope is fitted with a professionally made solar filter and the finder scope is covered with foil or some other com pletely opaque material 9 Care and Maintenance If you give your telescope reasonable care it will last a lifetime Store it in a clean dry dust free place safe from rapid changes i...

Страница 15: ...15 ...

Страница 16: ...arranted instrument that proves to be defective provided it is returned postage paid to Orion Warranty Repair 89 Hangar Way Watsonville CA 95076 If the product is not registered proof of purchase such as a copy of the original invoice is required This warranty does not apply if in Orion s judgment the instrument has been abused mis handled or modified nor does it apply to normal wear and tear This...

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