Which eyepiece is best for viewing planets?

Which eyepiece is best for viewing planets?

The focal length of the telescope is 900mm, so to achieve the maximum useful magnification, then a 4.5mm eyepiece would be ideal. One of the best parts about planetary viewing or imaging is that since the objects are so bright, you can do it just about anywhere regardless of light pollution.

What are 5 disadvantages of a refracting telescope?

Disadvantages:

• Very high initial cost relative to reflector.
• A certain amount of secondary spectrum (chromatic aberration) unavoidable (reflector completely free of this) The colours cannot focus at one point.
• Long focal ratios can mean that the instrument is cumbersome.

What can you see with a 25mm telescope eyepiece?

25mm – 30.9mm Telescope Eyepieces: These are extended field eyepieces for longer focal length – good for large nebula and open clusters. For shorter focal length, they are fantastic for large objects such as the Orion nebula, views of the full lunar disc, large open clusters and more.

What are three problems with refracting telescopes?

Problems with Refracting Telescopes

• Chromatic abberation. The red and blue light focusses at different locations creating coloured halos. This occurs because the path taken by blue light through glass bends more than red light.
• Lens distortion. A very large glass lens will tend to become distorted due to its own weight.

What are the problems with refracting telescopes?

One problem with refracting telescopes is that there is a frequency dependence for refraction, so the amount of refraction at each surface of the lens depends on the wavelength. Thus, different wavelengths focus at slightly different points.

What is a disadvantage of a refracting telescope?

Disadvantages. All refractors suffer from an effect called chromatic aberration (“color deviation or distortion”) that produces a rainbow of colors around the image. This is why the early refracting telescopes were made very long. How well the light passes through the lens varies with the wavelength of the light.

What are the two main problems with using a telescope with lenses?

Though they provided a tremendous advance over the bare eye, they also had problems; among these was the problem of making lenses with great accuracy. Also, there was the problem of color fringes along the edges of objects, known as chromatic aberration (chroma means color).

What are the problems with a refracting telescope?

Which is the best telescope eyepiece to buy?

Offered in both 2” and 1.25” these are excellent eyepieces. I often recommend the 2” in this series as excellent low power wide view eyepieces, especially in scopes at focal ratios below F7. For the cost, it’s very well worth to spend the money for this eyepiece.

Which is better a refractor or compound telescope?

And one of the easiest and most sought methods of discovering our solar system and universe is through the use of Refractor Telescopes. Refractor telescopes are easy to operate, offer a convenient design that makes them more manageable and requires less maintenance when compared to reflector and compound telescopes.

How much should I spend on eyepieces for a telescope?

Over time you will likely spend more on eyepieces than you spent on the telescope. But don’t fear you will waste your investment as eyepieces are standard sizes. If you upgrade the telescope or add a second one, the eyepieces will work in that telescope too. Eyepieces under $100 each are generally considered budget or low-cost eyepieces.

Can a Plossl telescope be used with glasses?

If you are on a tight budget, you can’t go wrong with Plossls. Just remember that at focal lengths of less than 12 mm the eye relief can get short. And if you are wearing glasses, consider staying with the longer focal lengths and using a Barlow to achieve higher magnifications.