Focusing the Telescope
With the 20mm eyepiece inserted into the diagonal, move the telescope so the front end is pointing in the general direc- tion of an object at least
Do You Wear Eyeglasses?
If you wear eyeglasses, you may be able to keep them on while you observe. In order to do this, the eyepiece must have enough “eye relief” to allow you to see the entire field of view with glasses on. You can try this by looking through the eye- piece first with your glasses on and then with them off, and see if the glasses restrict the view to only a portion of the full field. Fold down the rubber eyeguard on the eyepiece in order to get your glasses (and eye) as close to the eyepiece lens as possible. If the glasses do restrict the field of view, you may be able to observe with your glasses off by just refocusing the telescope by the needed amount.
If your eyes are astigmatic, images will probably appear the best with glasses on. This is because a telescope’s focuser can accommodate for nearsightedness or farsightedness, but not astigmatism. If you have to wear your glasses while observing and cannot see the entire field of view, you may want to consider purchasing additional eyepieces that have longer eye relief.
Operating the EZ Finder II Reflex Sight
The EZ Finder II reflex sight (Figure 4) makes pointing your telescope almost as easy as pointing your finger! It’s a non- magnifying aiming device that superimposes a tiny red dot on the sky, showing exactly where the telescope is pointed.
The EZ Finder II works by projecting a tiny red dot (it’s not a laser beam) onto a lens mounted in the front of the unit. When you look through the reflex sight, the red dot will appear to float in space. The red dot is produced by a
Remove the clear plastic tab near the battery cover; this tab prevents the batteries from accidentally being drained during shipment. Turn the power knob clockwise until you hear the “click” indicating that power has been turned on. Look through the back of the reflex sight with both eyes open to see the red dot. Position your eye at a comfortable distance from the back of the sight. The intensity of the dot is adjusted by turning the power knob. For best results when stargazing, use the dim- mest possible setting that allows you to see the dot without dif- ficulty. Typically a dimmer setting is used under dark skies and
white dots on the EZ Finder II’s body and power knob are lined up, the EZ Finder II is turned off.
Aligning the EZ Finder II Reflex Sight
When the EZ Finder II is properly aligned with the telescope, an object that is centered on reflex sight’s red dot should also appear in the center of the field of view of the telescope’s eye- piece. Alignment of the sight is easiest during daylight, before observing at night.
1.Aim the telescope at a distant object such as a telephone pole or roof chimney and center it in the telescope’s eye- piece. The object should be at least 1/4 mile away. Now, with the EZ Finder II turned on, look though it. The object will appear in the field of view near the red dot.
2.Without moving the main telescope, use the EZ Finder II’s azimuth (left/right) and altitude (up/down) adjustment knobs (Figure 4) to center the red dot on the object in the eyepiece.
3.When the red dot is centered on the distant object, check to make sure that the object is still centered in the tele- scope’s field of view. If not,
The EZ Finder II alignment should be checked before every observing session. Choose any distant target (during the day) or bright star (at night), center the object in the telescope’s eyepiece, then adjust the knobs until the object is centered on the red dot of the reflex sight.
Replacing the Battery
Should the battery ever die, replacement
Magnification & Eyepieces
Magnification, or power, is determined by the focal length of the telescope and the focal length of the eyepiece being used. Therefore, by using eyepieces of different focal lengths, the resultant magnification can be varied. It is quite common for an observer to own five or more eyepieces to access a wide range of magnifications. This allows the observer to choose the best eyepiece to use depending on the object being viewed. The GoScope comes with two eyepieces, which will suffice nicely to get started.
Magnification is calculated as follows:
a bright setting is used under
At the end of your observing session, be sure to turn the power knob counterclockwise until it clicks off. When the two
Telescope Focal Length
Eyepiece Focal Length
= Magnification
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