Eyes even wider open
Two important attributes determine your choice of eyepiece for a particular observation: the focal length and the apparent field of view (AFOV) in degrees (°). The focal length determines the magnification of a particular telescope (magnification = focal length of telescope/focal length of eyepiece) and the AFOV determines the true field of view observed depending on the magnification (true field of view = AFOV/magnification).
A standard Plössl eyepiece, like those often bundled with new telescopes, comprises four lens elements and produces an AFOV of around 52°. The Omegon Panorama IIs have between seven and nine lens elements with a large eye lens allowing for some clever optical manipulation to nearly double that AFOV to 100°. As a result, they produce a really wide true field of view.
As well as allowing you to see more of a large object through the telescope, a really wide field of view provides a wonderfully immersive experience giving you the feeling of being part of the view you’re observing.