from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Designed to focus on both near and distant objects at the same time
from the GNU version of the Collaborative International Dictionary of English
- adj. Literally, seeing everything; -- a term applied to eyeglasses or spectacles divided into two segments, the upper being designed for distant vision, the lower for vision of near objects.
from The Century Dictionary and Cyclopedia
- Having or affording a wide range of vision.
Sorry, no etymologies found.
A method was then referred to of making a rapid portrait lens cover a very large angle by pivoting at its optical center and traversing the plate in the manner of the pantoscopic camera.