INSTRUMENTS

ASTRAL TELESCOPE

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TERRESTRIAL USE OF THE TELESCOPE

As we have already seen, the telescope provides reverser images and is used directly with the oculars. In the case of astronomy observation this is not of great importance but it tan cause problems in the case of terrestrial observation. For this type of observation, particularly when you are planning on it, an Image Rectifier is advised. This will allow you to use the oculars you already have and to focus even at a short distance from the object.
The telescopes give good results in the ground observation of animals, views, boats, ships and mountains. For those who love observing nature and who wish to observe in the most minute detail even the most elusive of wild animals, it is the perfect instrument. Useful magnification for this type of observation depends largely on the brightness, or the contrast within the scenes to be observer and on the atmospheric conditions. The level of magnification is, therefore, left to the discretion and experience of the observer, but it is advised not to exceed the practical limits of magnification (see the General Notes section in the manual).
Likewise, it is not possible, under any circumstance, to obtain more detailed images, since this is beyond the scope of the objectives.

During terrestrial observation it is not advised, even where possible, to use equatorial mounting with the polar axis inclined. If you have a model with the equatorial mounting, it is advised to bring the polar axis into a vertical position (fig. 8), transforming the Right Ascension axis and the Declination axis respectively into those of Azimuth and Elevation, so rendering the telescope much easier to use for terrestrial observation.