Olympus Focusing screen 1-8. All matte type. ( for super telephoto lenses & astronomical telescopes)

Olympus Focusing screen 1-8. All matte type. ( for super telephoto lenses & astronomical telescopes)
This screen is ideal for use with super telephoto lenses of 300mm or more in focal length, or for astrophotography.
The extreme fineness of the matte surface permits outstanding field definition.
More accurate focusing may be achieved by the use of the Varimagni finder. When used with astronomical telescopes , bright images of celestial bodies are obtained both in direct objective and indirect magnified astrophotography. The meter needle gives correct light readings.