I have another thread about the Takahashi prism diagonal versus the Baader T2 non Zeiss prism diagonal. During my search for information I read posts and statements that the Zeiss APQ objectives were designed in such a way that a prism was needed for these scopes to perform to their potential. And I think it was the company's own 2" prism diagonal. I also read a claim that CFF refractors tuned for imaging needed a prism diagonal to perform their best for visual. I was not able to find that on the CFF site. The oddest thing I read was that the Astro Physics Traveler performed best with a prism diagonal. I find this all curious but I had read before about the Zeiss APQ and prisms but have never heard off this with CFF and thought the last thing you would want in a fast scope like the Traveler would be a prism diagonal.
Anyone have correct information about this
I have to edit here because I just found that CFF on their site does recommend a prism diagonal for photographically tuned objectives and mirror diagonals for their visually tuned objectives
Edited by Nippon, 21 July 2019 - 09:05 PM.