Question about Zhumell Optics

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General suitability for birding

Hallo to you, Can you let me know, 1. Does this Zhumell spotting scope with an angled eyepiece, or any similar other model, have ED aperture lens. 2. is there any significant chromatic aberation with this model and incidentally A big plus for striking blows for literacy but should not your own text set an example, (it is to 'writing' not 'caps' that 'all' refers) hence "writing ALL in caps" , kind regards, James Gibbs-Sier

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A) You have not stated to which model of Zhumell scope (of which I have never heard) this refers, but the new Swarovski has not only superb optical quality, but also a binocular eyepiece.

B) Thank you for stating the blindingly obvious in the second part of your query, which appears to be in response to some previous interaction between yourself and Fixya, the details of which you have not indicated.

Posted on Jun 18, 2017


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Posted on Jan 02, 2017


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I have picked up a KOWA TSN-1 for nothing that was going to be dumped and am trying to get it into usable condition. It has a dislodged prism that is rattling around behind the eyepiece.Can anyone explain...

Many of these small spotting scopes are GLUED together. -- not screwed.The scope is NOT suitable for Astronomy, but could be used for birding and or target practice.

Jun 10, 2011 | Kowa TS-501 (20 x 50mm) Telescope

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Need an erecting diagonal for tasco 11TR

Why? are you going to use the scope for terrestrial viewing -- bird watching etc etc

You do not need it for astronomical viewing--- no up or down in outer space.

Here are some:

These are usually sold in 1.25 inch size-- measure the hole in the focuser.

Feb 27, 2011 | Zhumell Tasco 900x114mm Luminova Reflector...

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I need the eyepiece for the vivitar refractor telescope ot accidently was broking when I shipped to the Bahamas

You don't say whether this is an astronomical telescope or a terrestrial one (spotting scope). However, I have a Vivitar scope which was sold as an astronomical scope, but is actually a spotting scope, although it uses astronomical style eyepieces, so...

I am not sure that it is the eyepiece you want, either. It is hard to break an eyepiece, but much easier to break the eyepiece mount or diagonal mirror fitting.

Most astronomical telescopes use a standard fitting eyepiece with a 1.25 inch outside diameter barrel. You can measure the mount where the eyepiece goes to make sure that yours is this size, then search on eBay or Amazon for "1.25 eyepiece" and you will find many available. It doesn't have to be made by Vivitar, any make will fit.

The other variable will be the focal length of the eyepiece, which is what determines it's power. The power of the scope will be the focal length of the main objective divided by the focal length of the eyepiece, so a 9mm eyepiece will give a higher magnification (and be dimmer and harder to focus and find objects) than a 20mm eyepiece. It is usual to have two or three different focal length eyepieces for viewing different objects.

Jan 23, 2011 | Vivitar (1607225) Telescope

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Need to find replacement lenses got at a pawn shop as a freebie with purchase of another scope

Eyepieces can be bought at many on line retailers. Here is one, your scope probably uses the 1.25 inch size-- measure the hole in the focuser.

Dec 22, 2010 | Zhumell Eclipse 114 Telescope

1 Answer

I bought an old Tasco 11TR reflector telescope at a used store, but it does NOT have any eyepieces nor manual. What should I buy to at least make this 'scope useable for moonwatching?

Eyepieces are available from many on-line retailers -- measure the hole in the focuser. Eyepieces come in 3 sizes, .965, 1.25, and 2 inch.

The .965 is very hard to find. Here are two retailers

All of Tasco's manuals are on this web site:

Oct 11, 2010 | Zhumell Tasco 900x114mm Luminova Reflector...

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Alignment problems

I'm not sure of which telescope and finder you have but I can give you some general instructions.

If your finder scope is is the type that is like a tiny telescope then you should see a set of cross hairs when you look into it. The goal is so that when the object is in the center of the cross hairs you should be able to find it in your telescope eyepiece.. To do this you need to align the finder scope,

I usually use a terrestrial object to do this. I use these because they don't move like stars do. You can choose road sign, a spot on a tree or a street light though that can disturb your night vision. Aim your finder at this object and center it in the finder. Check to see if it is in the eyepiece of your telescope. Use a low power eyepiece to give you a wider field. The low power eyepieces have higher numbers such as 25mm. If the object is not in your eyepiece find it and center it. Check your finder again. You need to adjust the finder so that the object is in the center of the cross hairs.

There are usually 1 to 3 thumb screws to adjust this. If there a three you go back and forth until it is centered. Check your eyepiece again to make sure the scope is still centered. You can use a higher power eyepiece (lower number) to refine this since it displays a narrower field. Just repeat the process.

Once this is done, you find the object in the sky in your finder and center it and it should be there in your eyepiece.

Clear skies!


Mar 20, 2009 | Optics

1 Answer

I have a WO IBIS 80 APO Spotting Scope. How do use it with other 1 1/4" eyepieces? The packaged zoom eyepiece seems to have a threaded attachment to the scope.

sounds like it was designed to use only the eyepiece that came with it. here is an idea...mount the scope on a tripod with no eyepiece in take an 1 1/4" eyepice and place against the scope where you would put the eyepiece ..try to focus..if you cant, then slowly bring the eyepiece away from the scope till you see a sharp sure a machine shop can make a sleeve to screw into your scope and hold 1 1/4" at that point.any questions i can answer call me 5088331232

Nov 29, 2008 | Optics

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