ampguy
Veteran
here are some interesting diagrams and history of the F 50/2 lens:
http://imaging.nikon.com/products/imaging/technology/nikkor/n02_e.htm
and here is a good article on why the later 105/2.5's 5/4 group Xenotar derived design improves on the previous Sonnar designs for this lens:
http://imaging.nikon.com/products/imaging/technology/nikkor/n05_e.htm
http://imaging.nikon.com/products/imaging/technology/nikkor/n02_e.htm
and here is a good article on why the later 105/2.5's 5/4 group Xenotar derived design improves on the previous Sonnar designs for this lens:
http://imaging.nikon.com/products/imaging/technology/nikkor/n05_e.htm