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To align the finder-scope perform steps 1 through 9 as outlined below, we recommend that the telescope is first
aligned during daytime. Please note that the view would appear mirrored and/or flipped depending on your
arrangement.
1. Attach the finder-scope to the telescope.
2. Mount the telescope to a photographic tripod or astronomical mount.
3. Attach the supplied 1.25” astronomical diagonal to the telescope and secure it in place.
4. Place a low power (i.e. 25mm) eyepiece in the telescope’s diagonal, secure it in place.
5. Loosen the movement locks of your mount/tripod, this will allow the telescope to move freely.
6. Point the telescope to a distant land object a few miles away (i.e. the top of a lamp post, tree or chimney).
You will notice that the image will be mirrored and/or upside down, this is normal for an astronomical
telescope.
7. Turn the focuser knob to bring the target in focus and centre the object in the eyepiece.
8. Re-tighten the tripod/mount movement locks so that the telescope remains stable during the finder-scope
alignment procedure.
9. Look through the finder-scope.
10. Use the collimating thumb-screws 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. You only need to use the three thumb-screws on a
single ring to align the finder-scope.
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. Please note that the view will not be the right way up and views will differ depending
whether a diagonal is used or not. If you do not use a diagonal you may need an extension tube to reach focus.
Using the ARC-152
If you are new to observing it is advisable to first use the telescope during daytime to learn how it operates. First
mount the telescope on a tripod or telescope mount. Once the optical tube has been mounted attach the finder-
scope, then attach a diagonal and low power eyepiece i.e. 25mm. Make certain that all parts are secure.
Simply choose a distant target to observe like a large building or large tree. Point the telescope towards the target
so that it roughly lines up with the target.
Look through the finder-scope, if you have not aligned it already this is a good time to do so before you proceed.
Move the telescope until the target is visible in the finder-scope and positioned under the cross-hair.
Once the object is lined up in the finder-scope you will be able to observe the target through the telescope’s
eyepiece. Look through the eyepiece, turn the focuser knob to bring the target into focus.
Terrestrial Observation
You can use the telescope for terrestrial observation for which you need a prism diagonal, otherwise the image will
appear mirrored and/or upside down. In astronomy it is not relevant if the Moon is say upside down, what is
important is to capture as much light as possible and correctors take some of this valuable light away.
Please note that this is a heavy and large telescope and as such it is difficult manage on a tripod. As such we
recommend that heaviest duty tripods and tripod heads.
Telescope view
Finder-scope view,
not aligned
Finder-scope view,
aligned
Содержание ARC-152 QUAD
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