© Opticstar Ltd / Ascension 2007-2014
8
1. Attach the finder-scope to the telescope.
2. Mount the telescope to a photographic tripod or astronomical mount.
3.
Place a low to medium power (i.e. 20mm) eyepiece in the telescope’s
diagonal. Secure the eyepiece in place.
4. Loosen the movement locks of your mount/tripod, this will allow the
telescope to move freely.
5. Point the telescope to a distant land object (i.e.
the top of a lamp post,
tree or chimney). You will notice that the image will appear mirrored
and/or upside down through the telescope, this is normal for an
astronomical telescope. The image will by correctly oriented when
looking through the finder scope.
6. Turn the focuser knob to bring the target in focus and centre the object
in the eyepiece.
7. Re-tighten the tripod/mount movement locks so that the telescope
remains stable during the finder-scope alignment procedure.
8. Look through the finder-scope.
9. Use the three collimating thumbscrews on the finder
scope’s bracket to
align the finder scope so that the cross-hair is precisely over the same
object in the eyepiece.
The finder-scope is now aligned to the main telescope. You can check and
refine alignment on a night sky object like a star if required. If you do not
use a diagonal you may need an extension tube to reach focus.
Telescope
view
Finder-scope
view,
aligned
Finder-scope
view,
not aligned
