If for any reason your GPS can’t pick up a signal you can manually enter the GPS coordinates. Press ◄ or ► key to move the cursor and using ▲ or ▼ key to toggle between “W” and “E”, “N” and “S”, or to change the numbers. It is always a good idea to do your home work to get the GPS coordinates before traveling to a new observation site.
The site coordinates information can be found from internet, such as GPSVisualizer (http://www.gpsvisualizer.com/geocode), by entering the city name or address. In case you only find the site information in decimal format you can convert them into d:m:s format by multiplying the decimal numbers by 60. For example, N47.53 can be changed to N47º31'48”: 47.53º = 47º
+0.53º,0.53º=0.53x60'=31.8',
0.8'=0.8x60"=48".Therefore, 47.53º=47º31'48" or 47d31m48s. Same as N47º31.8’: 31.8’=31’+0.8’, 0.8’=0.8x60”=48”.
4.2.2. Using your telescope
Selecting an Eyepiece:
1.Always begin viewing with the lowest power eyepiece. (Note: a 25 mm focal length eyepiece has a lower power than a
10mm one.) A formula can be used to determine the power of each eyepiece: Telescope focal length divided by eyepiece focal length equals magnification. Ex. 400mm ÷ 25mm = 16X (magnification). The rule of thumb is that the magnification should not be too much larger than the OTA aperture, otherwise view and color distortion may occur.
2.A 45° Erecting Diagonal Prism is included in the R80 or MC90 telescope. The Erecting Diagonal Prism is used to erect the image you will see. Astronomical telescopes are designed in such a way that the image you see may be UPSIDE DOWN and REVERSED. This is perfect for viewing celestial bodies. However, it will feel strange when observing a land object or a bird.
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Focusing Telescope:
1.After selecting the desired eyepiece aim the telescope tube at a
2.While looking through selected eyepiece, slowly retract focusing tube by turning focusing knob until object comes into focus.
Aligning Finderscope:
1.Look through main telescope tube and establish a
2.Turn on the red dot finder and look through the finder window. Adjust the red dot alignment screws to center the red dot on the object.
3.Now, objects located with the finderscope first will be centered in field of view of the main telescope.
4.2.3. Go to the Moon
After performing these setups, the mount is ready to GOTO and track objects. The most common object will be the Moon.
Press MENU button, select “Select and Slew” by press ENTER button. Select “Planets, Sun, Moon”, and using ▲ or ▼ button to select Moon. Press ENTER. The telescope will automatically slew to the Moon and lock on. It will automatically begin to track once it locks on to it. Use the arrow keys to center the Moon in your eyepiece, if it is not centered. Press BACK key to stop GOTO during the slew. Press ENTER key to stop the tracking.
4.2.4. Initial Star Alignment
A simple alignment/synchronization can be performed to improve the GOTO and