the lens is good in everything, but the optical design is the same as the mf nikon AI, AIS 1,4, enlightenment may be slightly better, nine blades in the aperture, the appearance of the lens, otherwise the lenses are similar, if you take a portrait, then as a rule it is done on open aperture or slightly covered, i. E. 1,4 or 2, while the aperture hole remains round even with seven blades, respectively, the blur is the same, everything else is from the photographer, not everyone has money for this zeiss, but nikon for 8 - 10 thousand in excellent condition without dust and dirt can be found, photo on nikon d300