Bushnell 78-8890 manual

Page 5 Saturn, Mars, Jupiter, and Venus are good second steps to take. Provided you did a reasonable job aligning the finderscope, a quick look through the main telescope tube at low power should reveal the same image.

Page 6 This might come in very handy if the family dog has just bumped the telescope out of alignment. By using this mode you can center the telescope on any known object and select align object to quickly recalibrate the Northstar alignment allowing continued enjoyment for the duration of the evening.

Page 8 With just two more steps, you will zero in on pinpoint accuracy. Now the telescope will lead you through a simple two star alignment process. Page 9 This is a great educational tool!!!! By pressing the BACK button, you move back to the previous level each time the button is pressed.

Press the button three times and you are back at the main level menu. Page 16 ST RR 19 Page Warranty Repair This warranty does not cover damages caused by misuse, improper handling, installation, or maintenance provided by someone other than a Bushnell Authorized Service Department. This is the first telescope ever created that actually speaks to you to educate you about the night sky. Consider this feature as your personal astronomy assistant.

Your Bushnell telescope can bring the wonders of the universe to your eye. While this manual is intended to assist you in the set-up and basic use of this instrument, it does not cover everything you might like to know about astronomy. Although Northstar will give a respectable tour of the night sky, it is recommended you get a very simple star chart and a flashlight with a red bulb or red cellophane over the end.

Page 5: Parts Diagram 3. Rack and Pinion Focusing Mechanism 4. Accessory Tray Brace 5. Quick-Release Accessory Tray 7. Remote Computer Controller 8. Main Telescope Tube 9. Quick-Release Adjustable Aluminum Tripod , , Telescope models will vary in focal length. Reflectors Only Included with this telescope is a Barlow lens. Now, objects located first with the Red Dot Finderscope will be centered in the field of view of the main telescope.

Page 9 Saturn, Mars, Jupiter, and Venus are good second steps to take. Provided you did a reasonable job aligning the finderscope, a quick look through the main telescope tube at low power should reveal the same image.

Page 10 Your telescope is a very sensitive instrument. For best results and fewer vibrations set your telescope up on a level location on the ground rather than your concrete driveway or your wooden deck. Page 12 Align Object: The Align Object Mode of Northstar provides the ability to refine your telescope alignment during the middle of your observing session. This might come in very handy if the family dog has just bumped the telescope out of alignment.

By looking through the eyepiece, center the star in the field of view by using the Motorized Movement Buttons or move the telescope by hand and press ENTER. These are the most interesting. Page 18 Catalog Index The following appendix information is more thorough information than that listed in the main instruction manual. For sake of space, the complete 20, object catalog is not listed. However, we have included the entire star list and the entire Messier object lists for your information.

Enjoy this and many others. Remove all components from the carton and identify all components. It is a good idea to lay all the parts out in front of you before assembly. Since your telescope is a precision optical system the parts require careful handling—particularly the onboard computer, telescope, eyepieces, and various accessory lenses.

Spread tripod legs to a comfortable distance. Fold down the accessory tray braces and place the Quick Release Accessory Tray on top of braces. See Quick Assembly Diagram. Turn accessory tray until it snaps into place. Adjust tripod leg height to suit by opening tripod leg lever and extending tripod legs to desired height. Clamp Tripod Leg lever closed when complete. Locate Main Telescope Tube. For ,back out silver lug screw on Telescope Mount top. For , slide black telescope tube bracket into telescope mount receiver.

Make sure telescope is pointing in the correction direction. Logo on telescope tube should be right-side up. For ,tighten silver lug screw on Telescope Mount top into desired depression on the black telescope tube bracket.

Locate Red Dot Finderscope. NOTE: The large end of the finderscope should face the open end of telescope tube. Attach Low Power Eyepiece. ForReflectorTelescopeModels: Insert lowest power eyepiece in the focusing mechanism by backing out eyepiece set screw and inserting eyepiece fully. Tighten all set screws to secure accessories.

You should always start viewing with the lowest power eyepiece, which in this case is the 20 mm lens. Note: the base power of each eyepiece is determined by the focal length of the telescope objective lens.

Telescope models will vary in focal length. Included with this telescope is a Barlow lens. Barlow lenses are used to double or triple the power of your telescope. Place your Barlow between the focusing tube and the eyepiece. Using the example above, your 3x Barlow lens would give you a total power of x or power. After selecting the desired eyepiece, aim main telescope tube at a land-based target at least yards away e. While looking through selected eyepiece in this case the 20 mm , slowly retract Focusing Tube by turning Rack and Pinion Focusing Mechanism until object comes into focus.

Locate Remote Computer Controller and coil cord. Remove Battery Door and insert one 9V battery. Look through Main Telescope Tube and establish a well-defined target. Now, objects located first with the Red Dot Finderscope will be centered in the field of view of the main telescope. First determine your targeted object.

Any bright object in the night sky is a good starting point One of the favorite starting points in astronomy is the moon. This is an object sure to please any budding astronomer or experienced veteran. When you have developed proficiency at this level, other objects become good targets.

Saturn, Mars, Jupiter, and Venus are good second steps to take. Provided you did a reasonable job aligning the finderscope, a quick look through the main telescope tube at low power should reveal the same image. With the lowest power eyepiece the one with the largest number printed on it you should be able to focus the same image that you saw through the finderscope. Avoid the temptation to move directly to the highest power. The low power eyepiece will give you a wider field of view, and brighter image—thus making it very easy to find your target object.

Every object you center in the finderscope will be easily found in the main telescope tube, which is important for continuing your exploration of the night sky.

The low power eyepieces are perfect for viewing the full moon, planets, star clusters, nebulae, and even constellations. These should build your foundation. However, for more detail, try bumping up in magnification to higher power eyepieces on some of these objects.

You can see mountains, ridges and craters jump out at you due to the highlights. Similarly, you can move up to higher magnifications on the planets and nebulae.

Star clusters and individual stars are best viewed through the low power no matter what. The recurring astronomical theater we call the night sky is an ever-changing billboard. In other words, the same movie does not play all the time. Rather, the positions of the stars change not only hourly as they seem to rise and set, but also throughout the year.

As the earth orbits the sun our perspective on the stars changes on a yearly cycle about that orbit. As a result you may notice that after a few minutes or a few seconds depending on what power you are viewing at, the objects in your telescope will move. Your telescope is a very sensitive instrument. For best results and fewer vibrations set your telescope up on a level location on the ground rather than your concrete driveway or your wooden deck.

If possible view from a location that has relatively few lights. This will allow you to see much fainter objects. View objects that are high in the sky if possible. Waiting until the object rises well above the horizon will provide a brighter and crisper image. Ever wonder why the moon appears orange as it sets on the horizon?

Note: If objects high in the sky are distorted or wavy, you are probably viewing on a very humid night. During nights of unstable atmosphere, viewing through a telescope can be frustrating if not impossible. This button flashes or strobes on and off during normal use. Note: The Northstar Computerized Star Locator will automatically turn itself off after 10 minutes of inactivity.

Enter Button: This button functions to select certain menu choices. When an object name or number is listed on the screen, the ENTER button can also be pressed to hear a spoken description and display a scrolling text description of the object. Scroll Up Button: This button functions to scroll up through various menus within Northstar.

Scroll Down Button: This button functions to scroll down through various menus within Northstar. MotorizedMovementButtons: These four multi-directional buttons will allow the user to override the tracking system and move the telescope utilizing the motors manually to another desired location.

The longer these buttons are depressed, the faster the Northstar will move until it reaches its maximum speed. The LCD is illuminated for use during nighttime viewing just like the buttons.