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How can i use lens for astronomical telescope f70060

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 44 Answers

SOURCE: Sear's Refractoring telescope Parts

Most of the refractors sold by Sears were made by Towa of Japan. These used the Japanese standard .965" barrel diameter eyepieces. These are hardo come by today and usually not worth the hunt. Get an 1.25" to .965" "hybird" star diagonal that will permit the use of 1.25" accessories. Orion sells this item. HTH, Geo.

Posted on Mar 02, 2008

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SOURCE: INSTUCTIONS

These are very generic in design -- this may help you--

http://www.uk-telescopes.co.uk/beginners_guide%20to%20telescopes.htm

Posted on Jan 11, 2009

x1y2z3c
  • 2 Answers

SOURCE: What kind of telescope to buy

This is a very common problem...with no common solution.
First you must know that no single telescope will be "perfect" for every application. The basis for this comes from the fact that there are many different objects to look at.

A basic rule of thumb goes along these lines; If you are looking at very small objects (ie stars, planets, asteroids etc.) then a long telescope will be useful, whereas wide objects ( the moon, star clusters, nebulas, and comets) need a short telescope.
Additionally, you will need a larger diameter telescope as the object(s) get dimmer.

A compromise is a telescope whose length is six to eight times its diameter. This is known as an "f/6" or "f/8" system. Small objects are usually best seen with f/8 or greater (f/15 is not unusual). While the wide objects use f/6 or less ("faster"- the lower limit is usually f/3). Magnification is not the deciding parameter (all of these systems can be adapted to provide identical magnification by choosing the appropriate eyepiece).

Select a telescope which best fits your budget and transportation capabilities. If you plan on setting the telescope up in your backyard then select the largest diameter you can afford. If you plan on taking the telescope out into the darkest skies far from home, then chose a telescope you can carry without giving yourself a hernia. Remember, you are supposed to be doing this to relax and enjoy it - not to go to hospital.

Finally, no matter which telescope you pick, a year down the line you'll want another one which fills in where the first one has limited capabilities. And heaven help you if you decide that you want to take photographs of your favorite objects. This hobbies has many many many facets and all of them can really dent your wallet.

Now that you are certain which telescope you want...have you decided on which mount you are going to put it on? Equitorial or Altitude-Azimuth? Driven or computerized? Tripod or post? Mounts are important too. If your mount is too flimsy you will be cursing it every time you bump it in the dark and you lose that hard-to-find object. Too bulky and the thought of lugging it out and setting it up will reduce your viewing nights. Again, a compromise is something that allows you to setup quickly but steady enough that your telescope never hits the ground.

Try to see some equipment first hand, so you can get their "feel". I would reccomend a visit to a local dealer (or go to a local amateur astronomer) so you can touch and feel before you buy anything. Amateurs are happy to show you their equipment, and answer any questions. They may laugh at some of your questions, but you will learn a lot more quickly (and at less cost) than doing all by yourself.

The paint on the outside might look pretty; but its the optics inside that count. If you can "field test" the telescope before you buy it, you'll have more confidence in your final(?) purchase.

Posted on Feb 10, 2009

SOURCE: i need the maual for a jason astronomical constell...

You will not find one for that telescope. However Meade maintains manuals for all of their telescopes. Look under REFRACTOR or REFLECTOR heading for one that is similar to your telescope. They all assemble and are used in the same way.

http://www.meade.com/manuals/index.html

Posted on Jun 01, 2010

SOURCE: I was just given a telescope and the only markings

It's a Meade 114EQ-D that is the model--- a reflector style telescope on an Equatorial mount.

You can find a manual on the Meade web site here:
http://www.meade.com/manuals/index.html

Look under the 4.5 inch REFLECTOR Heading.

Posted on Dec 05, 2010

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1 Answer

When looking thru the lens everything is upside down


Astronomical telescopes normally 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.

It is possible to fit an erecting prism or eyepiece to most astronomical telescopes, and some of them come with one.

Dec 31, 2010 | Edu-Science (10166) Telescope

1 Answer

Rokinon 900 mm x 130 mm Reflector Telescope everything is upside when you look in the len. Dont know how to fix this trouble


Astronomical telescopes normally 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. It is possible to fit an erecting prism or eyepiece to most astronomical telescopes, and some of them come with one.

Dec 26, 2010 | Rokinon Optics

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I am trying to sell a Tasco 302675 telescope but it is missing the lens for the eye piece. What is it worth with and without the lens and how expensive is it to replace the lens?


Not very much. Maybe $30 or $40. Might be better to just donate it to a school. You can find dozens of these types of scopes for sale on craigslist.com

Just search for TELESCOPE.

Dec 03, 2010 | Tasco Astronomical 302675 Telescope

1 Answer

I bought a basic Meade DS 2114 GOTO astronomical telescope for my father who is only just getting into telescopes and astronomy. As both of us are just beginners and mainly use the telescope leisurely, we...


NO it is NOT missing a lens-- all astronomical telescopes show upside down images.

You can buy an "erecting prism" diagonal for terrestrial viewing, but you do not need it to view the night sky.

Here is an example of the erecting prism:
http://www.astronomics.com/main/product.asp/catalog_name/Astronomics/category_name/EDNECFUVSRWS8KLNTU5E38XSE1/product_id/6329

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How can i make it....i want the measurements of lens to make it?


You want to GRIND a lens? This is VERY difficult, and not worth doing for a Tasco telescope.

May 20, 2010 | Tasco Astronomical 302675 Telescope

2 Answers

Image is upside down


A telescope sees that way. you have to have a corrective lens to right the view. Its a physics thing about how light goes thru a lens and at the lens flips over upside down, you need another neutral lens to flip it right side up again. If you got the entire kit try another lens till you find the corrective lens.

Jul 05, 2009 | Meade ETX-90EC (325 x 90mm) Telescope

2 Answers

Just came into a used tasco 302048 . Everything is upside down!!!


the scope is made for both terrestrial viewing and astronomical. In order to see terrestrially upright, you need an inverting STAR DIAGONAL. The eyepiece will do nothing for inverting the image. you might have 2 diagonals in the kit that came wih the scope. the diagonal is the part that fits into the scope. then you place the eyepiece in the diagonal. if you have 2 diagonals , one is a 90 degree angle,(astronomical) and one is a 45 degree angle, (terrestrial). the eyepieces change the magnification of the image. the bigger the number (9mm, 20mm, 26mm,) the smaller the image. the smaller the number , the bigger the image gets. the number is inverse of the image. Hope this helps.

Jul 01, 2009 | Tasco Luminova 40060660 (660 x 60mm)...

2 Answers

Tasco 57T Telescope


Loosen the set screw and it pulls off.

Jun 21, 2008 | Tasco Astronomical 302675 Telescope

2 Answers

Upside down sight


You need a 'spotting scope' adapter to right the image using a prism.

Jun 21, 2008 | Bushnell NorthStar Goto 100mm 788840...

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