I would like a "simple" explanation from someone on the free form generating process. What it is and why it is good. Also, it was my understanding that there are some differences between lenses like the Zeiss Individual and the Shamir Autograph and certainly between them and the J&J Definity. What are these differences because some are lumping them in the same category.

I just need some good explanation of this new technology as I am getting some conflicting reports. Anyone had any luck using them?