Not through the ground glass, but by rangefinder, to focus and framing, to capture natural moment of the model with Xenotar 150/2.8, that is what people dreaming of, which is also why X type is so special.
But after two X cameras were made, I stopped and had to face one obvious problem: RF is not match with the lens.
Before X type was made, cam for the lens was made by measured, plotting, then monitored grinding under microscope, in a try and error manner.
Here is some plotting of the lens characteristic curves , and here, and here.
Xenotar 150 has a big 2.8 aperture, and the way cam get ground is not good enough for such shallow range of focus range for this lens, I suffered to this problem for many days, months, stopped taking orders, trying to solve the problem, then I designed a way to make perfect cam for this lens, this took me year and a half.
It took about one year or so, maybe longer, but now I finally get the tip, and in confidence that I can make perfect match cam for Xenotar 150/2.8 on Byron, and the cam for any other lens too!
So Suwen, if you read this, I am on your X, you will have it before X'mas.
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