22 • Telescope Basics
It should be noted that the image orientation will change depending on the
viewing configuration. When using the star diagonal, the image is right-side-
up, but reversed from left-to-right. If inserting the eyepiece into the visual back
(i.e., without the star diagonal), the image is inverted (upside down and re-
versed from left-to-right). This holds true for the 6x30 finder as well as the
telescope. For correct orientation through the telescope, which is important
primarily for terrestrial observing, use the optional 45° erect image diagonal
1-1/4" (#94112-A).
Image Orientation
Figure 4-3
These simplified drawings of the planet Jupiter illustrate the different image orienta-
tions obtained when using various viewing configurations.
