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How do I change the focal length from 1400 cm to 750 cm on 6" twinstar reflector telescope?

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Posted on Jan 02, 2017

SOURCE: how to use Twinstar Atroquest

This is a reflector style telescope. Put the eyepiece with the largest number written on it into the focuser. Take it outside during the day time and practice focusing on a distant object.

If it is on an EQ mount read my EQ mount tip on my profile page. The scope will need to be polar aligned in order to use it properly if the mount is an equatorial.

Posted on Mar 21, 2011

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SOURCE: Manual for TwinStar 1000mm focal length telescope and equatorial mount

Equatorial mounts need to be polar aligned to work correctly. Once the scope is polar aligned (see manual or look online for polar alignment instructions), turn on the RA motor. Loosen your RA and DEC locks and find a object you want to view, The motor should keep the object in view for a while (depends on how good the motor tracks and how good your polar alignment is.) Spending 10 minutes polar alignment on my C8 keeps the object in view for about an hour without adjustment.

Posted on Dec 18, 2011

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1 Answer

Does it make a difference to your viewing if you have a bigger length telescope or a smaller one


Focal length not physical length would better answer your question. Shorter focal length scopes have a lower power but wider view per size of eyepiece.
BUT!
Tasco telescopes are basically junk telescopes. Any telescope from Celestron, Meade, Orion, Explore Scientific or Televue (to name the more popular) will give you a superior view compared to the Tasco.
A 60mm scope has the maximum magnification of 225x (under perfect sky conditions. I suggest a small, short tube reflector in the 4 inch range. They are lightweight, have much more light gathering power (more important than magnification) and easy to set up.

Oct 12, 2012 | Bushnell Tasco Telescope Galaxsee 525x60mm...

1 Answer

Manual for TwinStar 1000mm focal length telescope and equatorial mount


Equatorial mounts need to be polar aligned to work correctly. Once the scope is polar aligned (see manual or look online for polar alignment instructions), turn on the RA motor. Loosen your RA and DEC locks and find a object you want to view, The motor should keep the object in view for a while (depends on how good the motor tracks and how good your polar alignment is.) Spending 10 minutes polar alignment on my C8 keeps the object in view for about an hour without adjustment.

Dec 16, 2011 | Celestron Optics

1 Answer

How to use Twinstar Atroquest 8 Reflector telescope? I bought this telescope for my daughters and it did not bring any guide to learn hou to use it.


This is a reflector style telescope. Put the eyepiece with the largest number written on it into the focuser. Take it outside during the day time and practice focusing on a distant object.

If it is on an EQ mount read my EQ mount tip on my profile page. The scope will need to be polar aligned in order to use it properly if the mount is an equatorial.

Mar 20, 2011 | Optics

1 Answer

Hello, i have a Bushnell Rotary 340 power, mod. AG 78-1337, i don´t have the specification sheet and i need to know if is refractor or reflector, or both, also i need to know the opening, focal length...


A refractor has a lense in the front, and the eyepieces go into the back.

A reflector has a MIRROR inside.

Here are all the Bushnell manuals about 1/2 way down this page:

http://www.opticsplanet.net/bushnell-warranty.html

Oct 17, 2009 | Bushnell Optics

2 Answers

Who makes twinstar telescopes and how do i find


I suggest avoiding the Twinstar line of telescopes. These are sold by Taximarketer who sells a line of disappointing scopes including the Baytronix 150/1400. It is best to avoid Ebay unless you really know your stuff.

One reason is the lack of directions-- NONE!

However Meade telescopes maintains a web site with manuals for their telescopes. Look around the page and find one similar to your scope and download the manual for free.

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


Apr 19, 2009 | Optics

1 Answer

No manuals


Hi Darcy: the "D" stands for Diameter, and the "F" stands for focal length.
so its a 100mm=4 inches. 900mm is how long the light is..to reach the eyepiece.
let me know if this helps.
STH55

Nov 23, 2008 | Meade LX90GPS: 10" LX90 GPS Telescope

1 Answer

Vivitar Telescope


Eypieces in telescopes usually come in two sizes .9" and 1.25" diameter. There are hundreds of scientific companies or telescope companies that can supply you with an inexpensive replacement. The eyepiece focal lengths, usually in millimeters, determines the magnification of the telescope. The focal length of the main lens divided by the focal length of the eyepiece is the magnification of the telescope. Usually two eyepieces are enough for your scope. Good luck

May 11, 2008 | Vivitar (1607225) Telescope

1 Answer

Eyepieces lost


You did not mention your telescope make and model so:
1. measure eyepiece holder. Determine of you use .965in. or 1.25in. diameter eyepieces. If you use .965 eyepieces you are limited in choices. HANDSONOPTICS.COM carries nice Plossls. SURPLUSSHED.COM. sells .965 moon filters and cheaper eyepieces. If you have a 1.25 eyepiece holder, the skies the limit on eyepieces. Check Ebay plus other sites.
2. Determine the focal length of the eyepiece you want to use. As a rule, your scope can magnify 50x per inch of aperture although looking at just the moon, you can stretch that a bit. For example, a 80mm reflector (3.1 in). x 50 = 155x max. magnification (must be a perfectly clear night)
So now find the focal length of the scope (stamped/labeled somewhere) Typical refractor is 700mm. For maximum power (155x) it is: focal length of telescope/focal length of eyepiece = magnification. Or FL (scope)/ magification= FL eyepiece. 700/155= 4.5mm. This size will have terrible eye relief unless you spend $$$$$. Suggest a 10mm eyepiece which gives 70x power and a great view of the moon and planets

Nov 15, 2007 | Tasco Luminova 40114675 (675 x 114mm)...

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