Celestron 21072 Manual de instrucciones - Página 12

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Celestron 21072 Manual de instrucciones
7. Photography
Your 80mm EQ can be used photographically as well as visually. To turn your telescope into a telephoto
lens all you need is to use the built-in T-Adapter and a T-Ring designed for your particular camera make
(i.e., Nikon, Minolta, Pentax, etc.). The T-Ring, which replaces the camera's normal lens, threads onto the
T-Adapter.
A.
To attach a camera to your 80mm EQ:
1.
Remove all the visual accessories from your telescope.
2.
Thread the T-Ring onto the built-in T-Adapter threads until tight.
3.
Couple the camera body to the T-Ring the way you would to any other lens.
B.
Focusing the Camera
Once you have selected a target and centered it, turn the focusing knob until you achieve the sharpest
possible focus. (The focusing mechanism is the same photographically and visually.) Once the camera
has been focused, tighten the focusing set screw to secure the focus point. This will prevent the weight of
the camera from pulling the focus tube out further, thus changing the true focus.
Due to the high magnification of the camera/telescope combination, the micro prism focuser in your
camera may "black out." If this is the case, you will have to use the ground glass portion of your focusing
screen, which itself may be dark. For the best results, take your time. Look at your subject carefully to
make sure that you have the sharpest possible focus. To achieve a very sharp focus, consider using a
focusing magnifier. These devices are readily available from your local camera store.

8. TELESCOPE MAINTENANCE

With proper care your telescope should rarely need any maintenance work.
A. When not in use, always replace all lens covers to keep dust and contaminants off the optical
surfaces.
B. A small amount of dust on any optical surface is ok. If the dust builds up then use a can of
compressed air and then a camel's hair brush to remove the dust.
C. If the objective lens (internally) needs cleaning, it should be cleaned by a professional. Either have your
instrument serviced by a telescope repair facility or return it to the factory.
Figure 7
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