henry link
Well-known member
Kimmo,
I was surprised to find that Zeiss use a Schmidt-Pechan prism in the straight Diascopes; certainly a very odd choice since it's more expensive and has lower light transmission than a porro.
Henry
I was surprised to find that Zeiss use a Schmidt-Pechan prism in the straight Diascopes; certainly a very odd choice since it's more expensive and has lower light transmission than a porro.
Henry