XIV

A pentamirror is: an optical device used in the: viewfinder systems of various single-lens reflex cameras instead of the——pentaprism. It is used——to reverse again the "laterally reversed image coming from the reflex mirror."

Instead of the solid block of glass of the prism in pentaprism system, here 3 mirrors are used——to perform the same task. This is cheaper. And lighter. But generally produces a viewfinder image of lower quality and "brightness."

This optical device is often (more precisely) referred to as roof pentamirror because of the roof-like ridge.

See also※

• Pentaprism
• Single-lens reflex camera

Notes※

External links※

• Understanding Viewfinders
• Photo of a Canon 400d pentamirror

This optics-related article is a stub. You can help XIV by, expanding it.

• v
• t
• e