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Anonymous Posted on Mar 06, 2015

Hi I have a celestron Astromaster 76 but I cant see anything through the lense

Lense cap has been removed

4 Related Answers

Anonymous

  • 173 Answers
  • Posted on Aug 01, 2009

SOURCE: I cannot sight anything even the moon

The likely hood is, that the scope needs collimating.
If you don't have a collimator, you can easily purchase one, online.
I discovered the same problem with my scope, until I collimated it.
There are many different types available, 'Red Dot' lasers, or just simply a pin hole in a eye piece fitment.
The 'catseye', is the one I got.
It may seem a little complicated at first, but after you have figured it all out works, it will become clear, and once you've collimated for the first time, it takes no time at all to re-collimate.
There ya go, fixedYa!
P.s, don't forget to give a good thumbs up thankyou :)

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Anonymous

  • 1177 Answers
  • Posted on Jan 05, 2011

SOURCE: I have set up my

New telescope users are taken by surprise at the difficulty of just pointing the telescope in the right direction to see anything. The field of view is quite limited, especially if you are using a high power eyepiece. The higher the power of eyepiece on a telescope, the dimmer the image, the more difficult to aim it at any chosen object, and the more difficult to focus. When the scope is not focussed, even if there are stars in the field of view, they will only be faint blurs.

It is best when you are starting out with a telescope to try it with the least powerful eyepiece (the one with the highest number) to begin with, until you become more familiar with how it works. Do NOT use the Barlow lens if one came with the scope.

The finder scope is meant to help you get the main scope lined up on the object you want to view, but it won't be any use in pointing the telescope until you adjust it to precisely line up with the main scope. Telescope manuals recommend that you do this in daylight, by pointing the scope at an object on the horizon and adjusting the finder to match (never point a telescope toward the Sun!). Once you have a tree or mountain peak in the center of the main scope's image, you can then adjust the screws around the finder scope to get the crosshairs (or red dot) centered on the same object. It is very difficult to do this job in the dark, especially as objects in the sky are constantly on the move. You will find that there is a very wide range of movement in the focus mechanism, because different eyepieces focus at different points, but the actual focus range for any eyepiece will be a small part of the overall range afforded by the focusing mount. It is much easier to familiarise yourself with this in daylight.

At this point you will learn that astronomical telescopes usually show an upside down image. There is a good reason for this- erecting the image needs more bits of glass in the light path, which reduces the amount of light and increases aberrations. Even if this is only slight, astronomers prefer to avoid it, and they don't really care which way up the Moon or Jupiter appear.

Once you have done the above, you can try the scope at night, on an easy to find bright object like the Moon. Looking at random stars will probably be disappointing, as they don't look different under magnification. You will have to find planets, star clusters or nebula to see anything interesting. You will also find the the object you are looking at swims out of the viewing field, and you must continually move the scope to follow it. This will be more pronounced at higher magnifications. Again, use the least powerful eyepiece. Small scopes are often advertised as having unrealistic powers (300, 500) which can never be practically achieved. You just get dim blurs.

There is an excellent website for beginner telescope users at THIS LINK


Joe L

Joe Lalumia aka TelescopeMan

  • 3186 Answers
  • Posted on Sep 17, 2011

SOURCE: I have a Celestron Skywacher

Look at Celestron's web site for a manual-- here:

http://www.celestron.com/c3/downloads.php

Joe L

Joe Lalumia aka TelescopeMan

  • 3186 Answers
  • Posted on Sep 17, 2011

SOURCE: Hi Joe, My name is also Joe and I just bought a

Your DEC is the same as your Latitude--

Right Ascension does not matter for now. Polar Align the scope on the star Polaris-- read this:

http://arnholm.org/astro/polar_alignment/index.html

Once you are polar aligned, rotate the tube to a star in the sky that you KNOW the name of. Look up the Right Ascension of that star on a cell phone app or a laptop planetarium program like this one:
www.stellarium.org

Rotate the RA setting circle so it matches what the phone or laptop indicate. LOCK down the RA circle. Your scope is now adjusted to the sky and you can use the numbers on the DEC and RA to find other objects of known RA & DEC.


www.telescopeman.org
www.telescopeman.us
www.telescopeman.info

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Related Questions:

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1answer

What is the switch for below the viewing lens on a Celestron Astromaster EQ76 telescope?

Your picture is not very clear. However there is a complete setup video located here. I did NOT notice any switch near the eyepiece; only the thumbscrews used to hold the eyepiece in the focuser.

http://www.celestron.com/browse-shop/astronomy/telescopes/astromaster-76eq-telescope#
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Hi Joe, My name is also Joe and I just bought a Celestron AstroMaster 114 and need a hand with the elevation,inclination, declination settings(what should my gauges be set to) to star using the unit. Any...

Your DEC is the same as your Latitude--

Right Ascension does not matter for now. Polar Align the scope on the star Polaris-- read this:

http://arnholm.org/astro/polar_alignment/index.html

Once you are polar aligned, rotate the tube to a star in the sky that you KNOW the name of. Look up the Right Ascension of that star on a cell phone app or a laptop planetarium program like this one:
www.stellarium.org

Rotate the RA setting circle so it matches what the phone or laptop indicate. LOCK down the RA circle. Your scope is now adjusted to the sky and you can use the numbers on the DEC and RA to find other objects of known RA & DEC.


www.telescopeman.org
www.telescopeman.us
www.telescopeman.info
0helpful
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After i remove all the appropiate lens caps and align the red dot, i cant see anything out my lens except darkness. Total black background,day and night. Should i try something else,thanks.

Put the eyepiece with the largest number written on it into the focuser, do not use the 2x barlow. TRY AGAIN-- during the day time and practice focusing on a distant object.

The end with the FOCUSER is the UP end of the tube-- the mirror is on the bottom of the tube. Many beginners mount these BACKWARDS.
0helpful
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I TOOK THE EYEPIECE APART TO CLEAN IT AND HAVE THE LENSES OUT OF ORDER, WHAT IS THE CONFIGURATION OF THESE LENSES? CELESTRON 114.

NEVER EVER disassemble an eyepiece --- no one can tell you how the lenses go together there are dozens of combinations and some eyepieces have as many as 6-8 glass lenses inside!

Sorry buy another eyepiece and only clean the outside surfaces.
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Hi where can I find a manual for the Celestron 130 EQ

All of Celestron's manuals are here:

http://www.celestron.com/c3/downloads.php

Your scope is on an equatorial mount which must be polar aligned in order to be used. Read this:

http://www.optcorp.com/product.aspx?pid=3050
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Trying to use the telescope but cant see anything

Hi, this is a real handy scope. You need to remove the disk like cover for the high polished mirror located at the but end of the scope. Then insert one of the two ocular lenses provided into the viewing aperture. Next, aim the polished mirror end at something obvious like a street light. Use the range finder located opposite the viewing aperture, (switch red button on) and align the circles with the red dot. Happy viewing!
2helpful
1answer

I cannot sight anything even the moon

The likely hood is, that the scope needs collimating.
If you don't have a collimator, you can easily purchase one, online.
I discovered the same problem with my scope, until I collimated it.
There are many different types available, 'Red Dot' lasers, or just simply a pin hole in a eye piece fitment.
The 'catseye', is the one I got.
It may seem a little complicated at first, but after you have figured it all out works, it will become clear, and once you've collimated for the first time, it takes no time at all to re-collimate.
There ya go, fixedYa!
P.s, don't forget to give a good thumbs up thankyou :)
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