Note:  Do not rely on this information. It is very old.

Object Glass

Object-Glass is that part of a microscope or telescope which forms the first image of the object viewed. When a single lens is used as a magnifying-glass it may be said to combine the functions of both object-glass and eye-piece, and in this case the image formed is erect and virtual. In the case of microscopes and telescopes, however, the object-glass forms an inverted real image in the instrument, this image being viewed by the eye-piece. In all good instruments the object-glass is an achromatic combination of lenses, generally of flint and crown glass.

“I tell you the truth, whoever hears my word and believes him who sent me has eternal life and will not be condemned; he has crossed over from death to life.”
John 5:24