Omegon EQ-1 Mode D'emploi page 68

How to calibrate the setting circles and find objects using them:
1. The DEC coordinate should agree with that indicated by the star atlas. For Alkaid, the arrow on the setting
circle should indicate +49°.
2. The RA setting circle must be set to the RA value for Alkaid (or whichever star you have used). Turn the
setting circle by hand until the RA indicated is 13h 48m. You have now calibrated the right ascension for
this point in time. You will now be able to find any star or celestial object using the coordinates given in a
star atlas.
3. Select a celestial object in close proximity to Alkaid from a star atlas. The globular cluster M13 in the
constellation Hercules lends itself to this for example. It has the coordinates RA. 16h 42m, DEC. +36° 26' .
4. Loosen the DEC locking screw and move the telescope around the axis until the setting circle indicates
36° 26' . Re-tighten the locking screw.
5. Loosen the RA locking screw and move the telescope around the axis until the RA setting circle indicates
16h 42m. Do not turn the setting circle again because you have previously calibrated it.
6. The globular cluster (or another object selected by you) should now be close by. Use a low magnification
eyepiece to find the object. Now use the two slow motion controls to centre the object in the field of view
of your eyepiece.
EQ-1
RA locking
screw
RA locking
screw
RA setting
circle
Index
EQ-2
RA setting
circle
Index
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