4.2.4. 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 10 mm 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 may be 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.

Focusing Telescope:

1.After selecting the desired eyepiece aim the telescope tube at a land-based target at least 200 yards away (e.g. A telephone pole or building). Fully extend focusing tube by turning the focus knob.

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 well-defined target (see focusing telescope section). Tighten all lock knobs (Declination, Latitude, Right Ascension, Horizontal Axis) so that telescope’s aim is not disturbed.

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.

4.2.5.Go to the Moon

After performing these setups, the mount is ready to GOTO and track objects. One of the most common objects is 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.

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iOptron 8600, 8603, 8604, 8602 instruction manual Using your telescope, Go to the Moon

8602, 8604, 8603, 8600 specifications

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