an excellent solution in commerce for a top picture - significantly better than 16-55 2.8 - all the same, 1.4 and 2.8 are very much both in terms of ISO and flu / 1.2 Different pros: good LIGHT staff for permanent work - equivalent to 35mm light small quick accurate 1.4 perfectly working Got cons: expensive on 1.4 there is HA - they are eliminated with one button in LightRoom or in the camera itself when shooting in Jpeg - but still I would like without them