How To Set Up Telescope With Equatorial Mount

In past entries in this blog we have discussed the merits Equatorial Mounts vs Altazimuth mounts on telescopes, but we never really went into much item on how to properly use one of these mounts. Hither are some basic hints for a beginner kickoff trying to apply an equatorial mount. Notation that this are non hints for precision alignment – they are strictly for the beginner so they practice non get overwhelmed! Speaking of which

1) Keep y'all mount setup as simple equally possible at starting time.

Await at telescope instructions for equatorial mounts and y'all'll see a lot of information on adjusting setting circles, using a polar axis scope, and other heavy duty details. Here'south a hint: If you don't program on doing astrophotography or long, long viewing sessions you don't demand all of that setup! Hither is what you need to do:

2) Set the latitude scale to your breadth and aim the polar axis so information technology points due north

That'due south a lot of words there, but we'll simplify, and use pictures! First of all you need to set up your mount's alignment to friction match your location on the globe. The alignment is prepare from the latitude calibration on the side of the mount, ndear the bottom. Here is where it is on a small telescope:

There'southward three small parts to this. First is that arrotw thing pointing at numbers. You lot desire that pointer to betoken a number that is very, very close to you own personal latitude. Go and get a map if you need to. We hvae ours fix at forty degrees because that is the latitude of our store in Philadelphia. Or at least information technology is close to that.

The side by side office is to aim the mount so that the Correct Ascension centrality is aimed north. This helpful motion picture will point out which part of the telescope that is.

Point that shaft (afterwards adjusting the latitude) north. Try to be as accurate as possible only don't get hung up on it, employ a compass to help out.

One time you've done that, congratulations! You have done a basic polar alignment! What this means is that shaft you aimed is at present paralell with the Earth'south axis and if you lot were able to expect through it, information technology would be aimed roughly at the Northward Star (polaris).

This is a rudimentary alignment and is perfectly acceptble for most beginners. If you move into more avant-garde things similar astrophotography you volition need to be much, much more than precise in your alignment.

OK, so that was piece of cake but now is the hard part, yous have to change how you think about  things:

iii) Stop thinking in terms of up & down, left & correct, start thinking in terms of Right Ascension and Declination.

OK, and so an altazimuth or Dobsonian telescope moves in up/downwards left/right, which is easy to figure out, only lousy for tracking. Equatorial telescope move in Right Ascension and Declination, which is a bit harder to sympathize.

Basically, if yous spotter stars in the sky move (or seem to motility as the Earth rotates) you will find they move in an curving arc through the heaven. Past setting up your telescope as in role #ii you accept fix your telescope so that information technology tin can track those objects every bit they move. The play tricks is at present yous need to move the telescope in Right Ascension and Declination, non up/down left right. This is a change of mindset that yous will need to adapt to use the mountain  properly. The graphic  may assistance with understanding it (although we had to use a straight line instead of a bend for Right Acension).

So when y'all are on one angelic object and need to move it to some other yous can't just go "a fiddling to the left, then point the telescope upward a lot more than information technology is now. Yous accept to move the telescope in Right ascent, then move it about diagonally in Declination to become on target. This tin be frustrating to larn. With larger Equatorial mounts and a Star Atlas this can be easier by simply 'aiming with the setting circles', but setting the setting circles upwards complicates things more than than we are trying to practice for this weblog post.

And then year, you will have to practice this type of motion until get used to information technology. But keep in mind that as you move your telescope you might detect something:

iv) Your Equatorial mounted telescope volition never, ever look similar it does in the catalog while in use.

OK, and so remember this picture from the pinnacle of this blog entry?

Yes, that ane.

Well it is something of a prevarication. A big fat prevarication.

Oh, it looks nice. The telescope looks at its almost bonny in that position, which is why almost every EQ telescope from every company shows information technology in that position.

Believe me, they take tried to show it in other positions, only it just is just not photogenic at all.

See hither's the affair: Did you detect that large weight sticking on a pole downward from the telescope's tube? That is chosen a counterweight and it is there to remainder out the weight of the optical tube as it is being aimed. Just in that position shown (pointed straight down) it isn't doing anything!.

Because in reality, the telescope will more oftentimes look like this (or at least aimed like this if it were exterior):

This is of form, shot indoors, but information technology requite you an idea of how the telescope mightbe aimed. This is shot from the forepart (N) of the mountain so the telescope would be pointing West. Now the telescope's coutnerweight is actually doing something, but it would be doing fifty-fifty more if the telescope were pointed North or S, because the it would look like this:

Now the counterweigh

t is really doing its job.

So, about moving the telescope's into position:

5) Use the slow movement controls for when you are close to your target, move the telescope by loosening thursday

e lock screws for anything larger.

OK, so you lot might have noticed these spindly plastic knobs extending from the mount. Hither, we marked them on this motion-picture show in red.

These are the slow motion controls, they permit you to aim the telescope, and the one in Right Rising will allow you to track an object as information technology moves through the night sky with the turn of its knob. These things are awesome and 1 of the chief features of a Equatorial Mount.

And you should but use them in one case you are very close to existence where the object is you lot are viewing.

The slow movement controls can't move the telescope very much – they tin can go a few degrees but then they will accomplish their limit and won't motion the telescope any more than. You should try to avoid reaching this limit as information technology is hard to backtrack and you lot might demand that slack later on.

And so for larger movements it is better to loosen the lock screws (marked with blue arrows (at least the ones still in the picture)) and motion the tube by hand, roatating in in R.A. and Declination as needed. In one case you are shut to the target object, tighten the screws (disquisitional!) and use the slow move controls.

These hints should give you a rudimentary idea of how to operate your equatorially mounted telescope. At that place is a learning curve here and you will need to adapt to it. Only the benefits make it worthwhile, articulate skies!

How To Set Up Telescope With Equatorial Mount,

Source: https://spectrumscientifics.wordpress.com/2016/04/12/5-tips-to-use-an-telescope-with-an-equatorial-mount-the-easy-version/

Posted by: wardcoles1950.blogspot.com

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