[rollei_list] Re: Whiteface T with Xenar question
- From: "Austin Franklin" <austin.franklin@xxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Thu, 19 Mar 2009 07:59:58 -0500
Hi Sanders,
> Carlos, are you
> certain about your statement that the Tessar and the Xenar
> must be identical because F+H's requirements were the
> same?
It depends on what is meant by "identical" and what requirements you are
talking about. From what Carlos quoted from Prochnow:
"The technical specifications in quality control was the same for the
Xenotar
and Planar."
This sounds, to me, like mechanical and visual inspection. For example, the
diameter of the lense element, not having bubbles etc. I don't know that it
has a thing to do with the composition of the elements or the formula for
the lense. It may, but that is not for certain IMO.
So, I can guess that there may be some misunderstanding/misinterpretation of
what "identical" means. Just a guess.
Regards,
Austin
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