Split-image.

EN: Split-image.

Fotografie

Form of rangefinder image, bisected so that the two halves of the image are alignedonly when the correct object distance is set on the instrument or. in the case ofa coupled rangefinder, when the lens is correctly focused. SLR cameras may have aprismatic split-image system in their viewing screen. Works on the same principleas a microprism, and is restricted to apertures of f5.6 or greater.
Mir glossary