Noun
The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed.
Source: Webster's dictionaryAlmost all SLR cameras use a front surfaced mirror in the optical path to direct the light from the lens via a viewing screen and pentaprism to the eyepiece. Source: Internet
Because the magnification of a telescope is equal to the focal length of the objective divided by the focal length of the eyepiece, smaller focal-length eyepieces cause greater magnification. Source: Internet
A right-angle finder is available that slips onto the eyepiece of most SLRs and D-SLRs and allows viewing through a waist-level viewfinder. Source: Internet
In the eyepiece, it is a small galaxy of magnitude 10 with dimensions of 5 arcminutes by 2 arcminutes and a bright nucleus.sfn NGC 4945 is a spiral galaxy seen edge-on from Earth, 13 million light-years away. Source: Internet
Each drone received an electronic eyepiece. Source: Internet
Games are viewed through a binocular eyepiece and controlled using an affixed gamepad. Source: Internet