In a multiple lens optical system, the lens farthest from the eye.
- ‘A converging field lens will shorten the eye-relief (the distance from the eyelens to the exit pupil) of a telescope.’
- ‘But, unlike the standard geologist's field lens, this one has a camera.’
- ‘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.’
- ‘It also features mechanical interference in the three-element field lens.’