Celestron Omni Plössl 50° Eyepiece

The Celestron OMNI series eyepieces provide entry-level optical quality with an apparent field of view of 50° and a Plössl-type optical assembly. Lightweight and compact, they are also suitable for use with binoculars.

With an anti-reflective coating applied to the lenses, they deliver sharp and contrasted images, especially in the center. Each lens of the eyepiece (numbering 4) is blackened to minimize the appearance of stray light.

Their 50° apparent field allows enough of a celestial object to remain in view when observed through a non-motorized instrument.

The eye relief of the OMNI 6 mm eyepiece reaches 5 mm, meaning that the image remains comfortable up to a distance of 5 mm above the eyepiece.

With a focal length of 4 mm, this eyepiece is particularly suited for observing small apparent size objects (planets, Moon, planetary nebulae...) at relatively high magnification (166x on a 1-meter focal length optical tube).

The interior of the eyepiece is threaded in M28.5 x 0.6 mm to screw in 31.75 mm diameter (1.25") filters. Among others, interference filters such as OIII, UHC, H-Beta... help enhance contrast on many nebulae.