a porro prism is a solid piece of glass. Herb.... ----- Original Message ----- From: "graywolf" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, June 19, 2004 7:05 PM Subject: Re: Viewfinders
> A well made (expensive) porro prism (another name for a mirror prism) is almost > as good as a good glass prism (they use them a lot in binoculars). A cheap > poorly made porro prism is a piece of junk.
