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Actual image as seen with the
unaided eye
Inverted image, as viewed with
the eyepiece directly in telescope
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A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is
focused. Some telescopes, known as refractors, use lenses. Other telescopes, known as reflectors, use mirrors.
Your Firstscope telescope is a refractor telescope that use an objective lens to collect its light.
Image Orientation
The image orientation of any telescope changes depending on how the eyepiece is inserted into the telescope. When
observing through a refractor telescope using the star diagonal, the image will be right side up, but reversed from left to right.
However, when observing straight through, with the eyepiece inserted directly into the telescope, the image will be inverted.
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Focusing
To focus your telescope, simply turn the focus knob located directly below the eyepiece holder. Turning the knob clockwise
allows you to focus on an object that is farther than the one you are currently observing. Turning the knob counterclockwise
from you allows you to focus on an object closer than the one you are currently observing.
• If you wear corrective lenses (specifically glasses), you may want to remove them when observing with an eyepiece
attached to the telescope. However, when using a camera you should always wear corrective lenses to ensure the
sharpest possible focus. If you have astigmatism, corrective lenses must be worn at all times.
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ure 5
Figure 2 - Balancing in R.A.
Figure 3 - Balancing in Declination