Question about Swift 860R (175 x 60mm) Telescope

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30 year old telescope. do lenses go bad?

Can i clean lenses? which lenses do i use to view moon? i have h20mm sr4mm and i need a small lense for my hm6mm.

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  • 227 Answers

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
Specific:
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

Posted on Jul 10, 2013

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How to use my telescope to stare better at moon, venus ...etc


1. Download stellarium at stellarium.org (free) This will tell you where to find the planets.
2. Do not use the erect image eyepiece for astronomy, It is for terrestrial viewing only.
3. Buy a moon filter. They are inexpensive ($12 at Agena Astro and others)
4. Huygens (H20, H12.5) are VERY cheap eyepieces,They have narrow field of view and low contrast. Purchase a good plossl or better eyepiece, you will really see the difference.
5. The SR4 (symmetrical Ramsden) is another cheap eyepiece. Avoid eyepiece designs that were invented in the 1700s. See item 4 above.

Mar 16, 2013 | 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
http://www.rocketroberts.com/astro/first.htm

Mar 29, 2012 | Optics

1 Answer

I can't seem to see a darn thing , the lens cap is removed and lenses installed but i couldn't see anything last night


Telescopes have a VERY small field of view. You must be pointed directly at the object. Why not practice focusing during the day time on a distant object, and then try for a large target like the moon at night.

Dec 18, 2009 | Vivitar (1607225) Telescope

1 Answer

I cannot see Jupiter and its colored bands. All I see is a bright dot with 4 moons.


You may need a larger apeture for more detail. Do you have the closeup lense in place? I had a telescope many years ago and all I could see is about what you describe. It's the lenses you use, not a fault of the scope.

Aug 26, 2009 | Celestron Optics

1 Answer

I have the same Telescope and am looking for lenses


If the opening is about 1 inch then you need eyepieces that are .965 inch --

The common sizes are .965, 1.25 , and 2 inch.

.965 eyepieces are available for purchase on Ebay and here:
http://www.agenaastro.com/

Jul 14, 2009 | Tasco Luminova 40060660 (660 x 60mm)...

1 Answer

I cant figure out how to get the lenses to work?


If this is a small TASCO or BUSNELL telescope you bought a toy telescope--

Try this-- put the eyepiece with the largest number written on it into the telescope. This is your lowest magnification. Go outside during the day time and practice focusing on a distant object-- try to see the moon at night once you learn how to focus.

Jun 12, 2009 | Tasco Novice 30060402 (402 x 60mm)...

2 Answers

Can't see anything but moon


You apparently broke the focus knob-- in that small telescope you will be lucky to ever get 100x--- use only the lower power eyepiece, or return it as you said.

Here is the telescope that I recommend to beginners-- they come in various sizes depending on how much you want to spend. BIGGER costs more.

http://www.telescope.com/control/product/~category_id=dobsonians/~pcategory=telescopes/~product_id=09804

Apr 15, 2009 | Vivitar (1607225) Telescope

1 Answer

Cannot see anything out of main telescope


Do NOT use the barlow lens-- put the lowest magnification eyepiece into the scope-- practice focusing on the moon -- turn the focus knob slowly in and out until you get a sharp image.

Telescopes only show an area of sky about 1 degree wide or LESS--- this is about the size of the TIP of your finger held at arms length................ your scope is best used at low magnification.

Dec 30, 2008 | Edu-Science (10166) Telescope

1 Answer

Cannot see through lense


A telescope only shows about 1 degree or LESS of sky-- this about the size of the tip of your finger held at arms length! Point it at the moon and practice focusing the telescope.

Dec 25, 2008 | Tasco Galaxsee 45-114375 375X (375 x...

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