[davidmanze]

 I still have extreme difficulty in believing that it is that hard to make a simple, (what is effectively an extension tube), that can mount an F mount lens on a new Nikon ML camera, regardless of the sensor resolution or it's electrical necessities, a simple pair of calipers can measure any errors in alignment.

  Compare that with say the construction of a 24-70mm F2.8 or the 105mm F1.4 with all the lens grinding accuracy needed, exact couplet and triplet glued alignment, inner tube/outer tubes, mounting of elements, VR and bayonet exactitudes etc..

    Or the simple ball race that enables our world transport to function, is of far far greater precision...made in their zillions daily....there you are into the realms of engineering "lapping" of surfaces!

  I understand what you are saying JoJu, but frankly I think you are making a mountain out of a molehill here!

 

    All that is so much more difficult to accomplish than a plain extension tube, if Nikon cannot achieve that, they might as well pack up and start up a Japanese restaurant chain! 

  

  Actually now you mention it.........