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( MID # 1760612 )- When I put The eyepiece lenses I can't see nothing.

The eyepiece seems to be useless cause when I put it I can't view anything.

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30 year old telescope. do lenses go bad?

General tips
  1. Get Stellarium or another fine astronomy program
  2. During the day, point the telescope at a part of the landscape about 100 yards away. NEVER THE SUN!
  3. Use the lowest power eyepiece (highest number) in the focal tube.
  4. Center the landscape object in the telescope.
  5. Align the finder scope so that it points exactly where the main telescope is.
  6. At night, leave the scope out to reach thermal equilibrium (about an hour for small reflectors and refractors)
  7. Point the finder at the moon. The moon should be in the main scope also.
  8. Practice finding the moon before you start on the planets
  9. Once you are comfortable with the moon and planets, you can go for the deep sky objects
You can clean the lenses by using a camera brush/puffer. For stains: 1 part distilled water 1 part 97% or better isopropyl alcohol. Use a cotton ball to apply. One stroke per ball. Dry with cotton balls working form the center out.
The eyepieces you have are pretty poor. I suspect they are also 0.965 diameter. If so, go to Ebay and get 2 or 3 MA (modified achromat) or Kelner eyepieces They are very inexpensive.Your H20 (lowest power) is not too bad but very narrow field of view.
If your scope uses 1.25 inch diameter eyepieces, your options are too wide to expound here.
You will get a good, low power view of the moon with the 20mm but the sr4's eye relief (distance your eye has to be to the top of the eyepiece to focus) may make it difficult

Jul 09, 2013 | Swift 860R (175 x 60mm) Telescope

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How do i set up eye pieces and focus lenses?? Instruction manual came in chinese with no translation and we are begiiners!

During the day:
1. Point to a far (1000 meters or more) object
2. Insert the lowest power (highest number) eyepiece e.g. 25mm
3. focus on the object.
4. Align finder to match what you see in the scope.
At night.
1. Put scope out and let it reach the temperature of the outside.
2. Point finder to the moon (1st object you should always use to check scope and finder alignment)
3. Use the same low power eyepiece.
4. If everything seems fine, switch to a higher power eyepiece and enjoy the view. You may have to slightly adjust the finder to align with the main scope.
If the views are blurry, the telescope may be out of collimation. Look on the internet for generic collimation instructions.
If this still did not help. Throw the scope out! Its probably a piece of junk and will only discourage you.

Dec 12, 2012 | Optics

1 Answer

Elbow mirror for a Cstar telescope

These diagonals as they are called are nearly all 1:1, that is, no magnification. They are only used to turn the image right way up, and give you a comfortable view from the side.

If you want a bit more magnification you can either get eyepieces with a shorter focal length, eg 15mm or 10mm

or magnifying Barlow lenses, which go in between your KE20 and the scope.

I would recommend one or two more eyepieces. Bear in mind that there is a limit to magnification your scope will support before the image goes all fuzzy. Your current EP gives 550/20 = x27 magnification. To get x100 you would need an EP about 5mm. This will be about as much as your telescope will support.

So I'd buy 2 more EPs, one about 5-6mm, and one about 10-12mm.

Jun 01, 2012 | Optics

1 Answer

No manual need advice on attachments

These are lenses of varying power, or magnification. The SR4 is a 4mm Ramsden, which theoretically will give high magnification. The H20 is a 20mm Huygens, less magnification but much more useful.
As magnification is increased, the image gets more blurred, and the object (like a star) becomes very very difficult to find and keep in view. I would throw the SR4 away.
the 1.5x erecting eyepiece is a terrestrial viewing eyepiece of x1.5 magnification, which shows an image right way up, and 50% closer.
The 2x Barlow is a tele-extender which halves the focal length of an eyepiece and doubles its magnification. It is mounted between the eyepiece and the scope. A 15mm eyepiece becomes a 7.5mm when used with the Barlow.
You will probably use the 20mm and 15mm mostly by themselves though.
Here is further reading

Mar 29, 2012 | Optics

1 Answer

I have the whole telescope assemble except I'm having trouble with the lense and eye piece. I have the 78-9970 refractor scope and I don't understand where to put the 4mm lense (and the other...

Put the diagonal into the rear focuser-- then put the eyepiece into the diagonal. DO NOT use the 2 x barlow if you have one. AND the 4mm may also be too much magnification for this size telescope.

So-- put the eyepiece with the largest number written on it into the diagonal and practice focusing on a distant object during the daytime. DO NOT POINT the scope at the sun! You will be instantly blinded!

Jul 01, 2011 | Bushnell Voyager 78-9970 Telescope

1 Answer

We have a refractor AZ2 holder (the only name we have.) No manual, several lenes, but how to put them together??? The lenses are SR4mm, H12.5mm, 1.5X erecting eyepiece & 3X Barlow Lens. Hope you can...

The 3 x barlow will be useless for this small telescope.

Put the 1.5 x erecting PRISM into the telescope and then put the eyepiece with the largest number written on it into the erecting prism. This is your lowest magnification.

Take the scope outside during the daytime and practice focusing on a distant object. Turn the focuser knobs slowly until the object comes into sharp focus.

Aug 07, 2010 | Optics

1 Answer

My 9t eye piece was rattling and mislined. I took it apart cleaned lenses and wondered is there a lense location or direction?

Never disassemble an eyepiece unless you know exactly how to put it back together. Only the outer glass lens ever needs cleaning.

Without knowing exactly what link of eyepiece you have (they are all different designs) it's impossible to tell you which way the internal lenses go.

Your best bet may be to simply purchase another eyepiece.

Nov 07, 2009 | Tasco Astronomical 302675 Telescope

1 Answer

I also bought one & have no idea how the lenses should work...

Verify that the mirrors are aligned; look through the eyepiece holder (without an eyepiece) and you should see the main mirror with your eye looking back from the center. Ensure that there are no filters on the eyepiece, and use the lowest power one to begin (longest focal length).

Sep 08, 2009 | Tasco Galaxsee 46114500 (500 x 114mm)...

1 Answer

Where can I get lenses and aiming knob for a 114EQ-D.

Hardware store for missing parts like screws and nuts--- these two internet retailers sell eyepieces --

Mar 11, 2009 | Meade Infinity 114EQ-DH Telescope

1 Answer


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

Put the eyepiece with the largest number written on it into the focuser-- do not use the 2x barlow if you have one. Practice focusing with this eyepiece during the day time on a distant object like a telephone pole or a building.

Apr 07, 2008 | Tasco Galaxsee 46114375 (375 x 114mm)...

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