Omnie Series

Blackened lens edges suppress internal reflections and increase contrast,
the multi-layer coating on each lens surface enables maximum contrast and light transmission,

In addition, each eyepiece is anodized twice to suppress reflections on the housing - many other manufacturers have reflective surfaces instead.

You can screw any 1 1/4" Celestron eyepiece filter into the thread of the eyepiece sleeve.

Many inexpensive entry-level telescopes are supplied with cheap eyepieces, which are sufficient for a first look through the telescope, but soon give rise to the desire for something better - a small field of view or an uncomfortably short eye relief spoil observation. Simple eyepiece designs according to Kellner, Ramsden or Huygens (recognizable by abbreviations such as K, H, or SR) are no longer up-to-date - even if they are often advertised as "high-performance eyepieces".

With the Omni eyepieces, Celestron offers an inexpensive alternative. These are Plössl eyepieces with a four-lens, symmetrical design. Blackened lens edges prevent reflections inside the eyepieces and increase contrast, the multi-layer coating on each lens enables maximum contrast and light transmission. Also, each case is anodized twice to prevent reflections - you'll find reflective surfaces at other manufacturers instead.

The eyepieces are pleasantly light and offer a good field of view - although it is smaller than with the much more expensive wide-angle eyepieces, there is no longer any disturbing tunnel vision. You can screw in any 1.25" filter via the filter thread integrated into the eyepiece sleeve, e.g. to dampen the light when observing the moon or to use nebula filters for deep sky observation.
With a Barlow lens you can double the magnification.

A retaining groove in the socket prevents the eyepieces from slipping out of the focuser and falling onto the floor when you swivel the telescope and the clamping screw may have become loose.

The Plössl construction method
The Plössl eyepieces are among the first modern eyepiece designs and go back to the Austrian optician Simon Plössl, who developed them as early as 1860. The design only caught on in the 1980s, as it can be manufactured with good quality using modern techniques and is far superior to older eyepiece designs. With an apparent field of view of around 50°, they are good, versatile eyepieces that can accompany you for many years. If you are looking for inexpensive eyepieces that are worth the money, the Celestron Omni eyepieces are a good choice.