Conclusion for me: NO
18mm - Very good sharpness open edges acceptable, Fade margins improved sufficiently
24mm - ditto.
35mm - catastrophic drop in sharpness over all edges badly, Fade brings nothing. Repeated several times.
50mm - 18mm as
70mm - still
135mm - again a focus slump as 35mm
200mm - surprisingly well even at the edges
The focus was a result of early openings even on my D300S, with the professional AF module with 51 AF sensors, with less light massive problems.
Ultimately, are too serious for me the disadvantages, an aperture poorer initial opening so dark, worse exemption, strong distortion, slow and ill-fitting focus.