"Front-End Filter Solution" to get corner-to-corner sharpness
A welcome topic launched to solve the problems with legacy lenses without changing the the thick filter in front of the sensor.
Correct the problem by putting a front-end filter.
See topic started here. Would like to share this because the more people become aware of this the better the solutions will be.
see here: http://www.fredmiranda.com/forum/topic/1453834/0