Olympus Focusing screen 1-13. Microprism/split image-matte type. ( for most lenses)

Olympus Focusing screen 1-13. Microprism/split image-matte type. ( for most lenses)
Most suitable for normal photography this screen assures pin-point focusing. The central split-image rangefinder is encircled by a microprism collar . since the outer area has a matte surface, the screen can be used in the same way as the standard 1-1 and 1-3 screens.
Align the split vertical lines of the subject image, or focus on the microprism or matte area.
When a lens with a maximum speed of F5.6 or slower is used, the prism darkens and focusing must be made on the matte area. The meter needle gives correct light readings.