Pentamirror
Appearance
![](http://up.wiki.x.io/wikipedia/commons/thumb/1/1c/SLR_Pentamirror.png/240px-SLR_Pentamirror.png)
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.[1]
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.[2]
This optical device is often (more precisely) referred to as roof pentamirror because of the roof-like ridge.[3]
Notes
[edit]External links
[edit]