Question about Tasco Galaxsee 45-060675 Telescope

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How to use the lents 1.5X ,2X , 3X Barlow lents

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They multiply the magnification of the eyepieces. Insert the barlow first and then insert the eyepiece into the barlow.

SO--- let's use the 2x as an example. If you have a 20mm eyepiece, then with the 2x barlow it becomes a 10mm eyepiece.

Posted on Aug 24, 2010

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Focusing


Just put the eyepiece with the LARGEST number written on it into the focuser. DO NOT USE the 2x or 3x barlow if you have one. Practice focusing on a distant object during the day time-- and NEVER point the scope at the sun or try to look at the sun.

Turn the focus knob until you get a sharp image just using this one eyepiece.

Read my tips on my profile page.

May 03, 2011 | National Geographic 76AZ (525 x 76mm)...

1 Answer

Vivitar 76mm reflector teles.76700 barlow lens 3x eyepiece is to small for it.is there a reducer for the barlow ?kit came with two 3x barlow.same size


No the barlow increases the magnification by 3 TIMES for any eyepiece --
this will be too much for that small 76mm telescope.

Magnification is the least important quality of a telescope. Aperture and quality ioptics are much more important. I usually never use a barlow -- just the straight eyepieces in various mm sizes.

Read my tips on my profile page.

Feb 03, 2011 | Vivitar (1607225) Telescope

1 Answer

(2x+3y)(3x+2y)


(2x - 3y)(3x + 2y) = 2x*3x + 2x*2y - 3y*3x - 3y*2y
= 6x^2 + 4xy - 9xy - 6y^2
= 6x^2 - 5xy - 6y^2 You multiply each element in the first set of brackets by each element in the second set of brackets and then consolidate like terms and arrange them in sequence of powers, first x and then y. So:
2x by 3x = 6x squared
2x by 2y = 4xy
-3y by 3x = -9xy
-3y by 2y = 6y squared

6x squared -5xy + 6y squared

Dec 04, 2010 | Yahoo Computers & Internet

1 Answer

What is the barlow lens for and how do i use it


It multiplies the normal magnification of the eyepiece. They come in 2x, 3x, 4x, and 5x powers.

Normally in a very small telescope like your scope, they are completely useless! They generate too much magnification for that small aperture.

You would normally put the barlow into the telescope, and then put the eyepiece into the barlow lens.

Jun 15, 2010 | Edu-Science (10166) Telescope

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I have a 3x Barlow telescope that is completely disassembled and I need instructions on how to reassemble thee entire telescope.


There is no such thing as a 3x barlow telescope. A barlow is a small accessory that multiplies the magnification of any eyepiece.

This is a barlow-
http://www.agenaastro.com/GSO-1-25-2x-Barlow-Lens-p/obar-gs-gs2bl.htm

May 19, 2010 | Optics

1 Answer

Can't see anything through the lens on a Galeleo D76


I believe this is a refractor style telescope. Put the eyepiece with the largest number written on it into the telescope. DO NOT use the 2x or 3x barlow if you have one.

Practice focusing on a distant object during the day time. The moon should be your first target at night.

Read the web site listed below and my TIPS on my profile page.
http://www.texasastro.org/telescope.php

May 09, 2010 | Galileo Refractor Telescope

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When i bought my tasco 46-114500 i did not receive my 250x lens can you help me dennis at 419-349-1983


You mean your 2x or 3x barlow. These can be purchased from many on-line retailers:

Here are two:

http://www.telescope.com/control/category/~category_id=barlows

http://www.agenaastro.com/Barlow-Lens-1-25-inch-s/66.htm

Nov 07, 2009 | Tasco Galaxsee 46114500 (500 x 114mm)...

1 Answer

Cant see anything out of it


These are known as toy telescopes. Put the eyepiece with the largest number written on it into the telescope. DO NOT USE the 2x or 3x barlow.

Go outside in the day time and practice focusing on a distant object.

Aug 10, 2009 | Edu-Science Optics

1 Answer

What lens do i insert into scope to view the moon


The moon is big so use the 25mm. The Barlow will have a multiplication marking on it 2x 3x etc. A 2x Barlow lens will effectively double the power of the eyepiece you are using. Do not use the erecting eyepiece for anything other than land viewing. Erecting eyepieces generally reduce the amount of light reaching your eye and thus reduce brightness of the faint objects in the sky.
So basically just place the 25 mm lens in the focuser and point the scope at the moon and you will be amazed at what you can see and how bright it is.

Dec 30, 2007 | Tasco 350x50mm Refractor Novice Telescopes

5 Answers

Algebra 1


B. 2((2-Y)/3)-Y=3
2(2-Y)-Y=9
4-2Y-Y=9
-3Y=9-4
-3Y=5
-Y=5/3
Y=-1.67

A. 3X+(-1.67)=2
3X-1.67=2
3X=2+1.67
3X=3.67
X=3.67/3
X=1.22

Nov 05, 2007 | SoftMath Algebrator - Algebra Homework...

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