Definition of field lens in US English:

field lens


  • In a multiple lens optical system, the lens farthest from the eye.

    • ‘But, unlike the standard geologist's field lens, this one has a camera.’
    • ‘A converging field lens will shorten the eye-relief (the distance from the eyelens to the exit pupil) of a telescope.’
    • ‘It also features mechanical interference in the three-element field lens.’
    • ‘But according to Honoratio Fabri in his Synopsis Optica (Review of Optics) of 1667, the first microscope with a field lens was built to Monconys's specification in Augsburg in 1660, so anticipating Hooke by several years.’