There are a variety of different telescope eyepieces of different magnification, and the ones you choose will be dependent on the observations you wish to carry out.
Eyepieces come with different barrel diameters , the diameter of the cylindrical part of the eyepiece, that fits into the telescope's eyepiece holder.There are three common sizes currently available, 2.00 inches, 1.25 inches, and 24.5 millimeters (0.965 inch).
The term eye relief is the distance between the final glass surface of the eyepiece and the lens of your eye when you are looking through it.
This is quite an important issue as it isparticulary if you wear glasses. It can make all the difference to your viewing comfort.
It's quite possible you will require several different eyepieces if you are to cover the multitude of viewing options available to you.
In the event you wish to do some terrestrial viewing as well you will need a star diagonal if you wish to view object the right way up.
Here are several telescope eyepieces that are commonly used.
Amongst the most common is the Plossl Eyepiece. It utilizes four to five elements and has a wider field of view than Orthoscopic lenses. It typically ranges from 50-52 degrees.
Barlow lenses are a great piece to have as they can double or triple the magnification of your eyepiece. Many astronomers wouldn't be without this one.
For more general use, the Orthoscopic lenses are considered the best by many people. They use four elements and are good for planetary viewing. They have a 45 degree field of view.
The Kellner is a general purpose lens. It has a three element design and a 40-45 degree field of view.
The Ramsden and Huygenian are good solar lenses. They have two element designs. They are supplied with the least expensive telescopes and have very narrow fields of view.
Erfles are not as favorable today. They use six elements and and a 60-65 degree field of view.
Televue has come out with some designs for eyepieces. The six element Panoptic has a 67 degree field of view. and a seven to eight element Naglers. This lens has an 82 degree field of view..
Pentax also makes a seven element lens, the SMC-XL. It is thought that these exceed the what the Televue can do.
One last point, don't forget to keep your optics in tip top condition by using a optics cleaning kit. There are several companies that have handy kits available.
Eyepiece And Filter Kit
Buying eyepieces separately can be both time-consuming and expensive, when what you really want to be doing is viewing.
Zhumell offer an 1.25" Eyepiece and Filter Kit which includes all you require if you're just starting out or even if your adding to your collection.
Baader Hyperion Eyepieces
These modular eyepieces with their wide field of view, razor-sharp images and flexibility they are difficult to match in almost any other range of eyepieces
In astronomy, the addition of a Barlow lens effectivley doubles the magnification.
It's a fact of life that Coma is an inherent property of telescopes using parabolic mirrors. All parabolic mirrors used in Newtonian reflecting telescopes are limited in field sharpness as a result of coma
Celestron eyepieces come in several different classes of eyepieces to meet the observing needs of users.
The eye relief is superior to the Huygenian although not as good as the Ramsden eyepiece.
Meade Series 4000
Professional 4 to 8-element models that enable levels of optical efficiency that is usually extremely hard to achieve with eyepieces with a lesser number of elements.
This eyepiece is probably the most popular design used by amateur astronomers today
Skywatcher Super Plossl Eyepieces
The SP series eyepieces minimize spherical abberation, distoration, astigmatism and off-axis color white oversize optical elements afford the observer luxurious eye relief.
Each TeleVue design is configured to achieve the sharpest full field, with the number of elements and groups minimized, while yielding the largest possible true fields and eye relief.
William Optics SWAN Eyepieces
The 5 element optics of Swan eyepieces are well made and will work well with telescopes having a focal ratio of F6 or slower
William Optics UWAN Eyepieces
Great contrast, with fully internally blackened (lenses’ edges and internal spacers), no flaring or ghosting on high-contrast objects.
This is a secondary lens mounted in between a camera and photographic lens, and is used to increase the magnification of the image seen or recorded on a camera.
Vixen LVW Lanthanum Eyepieces
The Vixen LVW eyepiece is designed to give you an incredible wide rich field of view, while reducing any internal loss of contrast or sharpness.
Zhumell Barlow Lens
The ED optical lenses provide superior image quality and contrast, maximizing the starlight that reaches your eye
Zhumell Z Series Eyepieces
With extraordinary power and contrast, you’ll get outstanding color rendition without the presence of flares or ghosting
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