11-09-2011, 02:15 AM
[quote name='Studor13' timestamp='1320762957' post='12764']
OK, so for those out there who rely (solely) on Photozone's resolution numbers, here are my own non-scientific results at 35mm (large files 6MB) - about 2m from subject to lens (60x focal length):
18-35mm @f4.5
http://www.studor13.si/music/photos/PZ/1835-35-f45.JPG
35mm AIS @f4
http://www.studor13.si/music/photos/PZ/35AIS-f2-f4.JPG
18-55mm II @f4.5
http://www.studor13.si/music/photos/PZ/35Kit-f45.JPG
18-55mm VR @f5
http://www.studor13.si/music/photos/PZ/35VR-f5.JPG
The results at other focal lengths are in favor of the 18-35mm universally, except wide open at 18mm.
As I have said (twice), it is beyond believe that PZ can claim that the resolution in the corners of the 18-55 VR at 35mm wide open can be almost double that of the 18-35 also at 35mm and also wide open!
[/quote]
For the 18-55 VR shot, did you leave the VR on while the camera was mounted on a tripod? To me, it looks like motion blur from the VR, but I could be wrong.
Anyway, if you are shooting landscapes at f/8 or f/11, the sharpness of all lenses are more or less the same. If that's the type of photos you take, you are probably more interested in color rendition, flare, and other things you call the "X-factor". So in essence, you are not wrong in your assessment. However, you also have to realize that PZ isn't wrong in their rating assessment either. It's just a different take under different circumstances with emphasis on different aspects of a particular lens.
OK, so for those out there who rely (solely) on Photozone's resolution numbers, here are my own non-scientific results at 35mm (large files 6MB) - about 2m from subject to lens (60x focal length):
18-35mm @f4.5
http://www.studor13.si/music/photos/PZ/1835-35-f45.JPG
35mm AIS @f4
http://www.studor13.si/music/photos/PZ/35AIS-f2-f4.JPG
18-55mm II @f4.5
http://www.studor13.si/music/photos/PZ/35Kit-f45.JPG
18-55mm VR @f5
http://www.studor13.si/music/photos/PZ/35VR-f5.JPG
The results at other focal lengths are in favor of the 18-35mm universally, except wide open at 18mm.
As I have said (twice), it is beyond believe that PZ can claim that the resolution in the corners of the 18-55 VR at 35mm wide open can be almost double that of the 18-35 also at 35mm and also wide open!
[/quote]
For the 18-55 VR shot, did you leave the VR on while the camera was mounted on a tripod? To me, it looks like motion blur from the VR, but I could be wrong.
Anyway, if you are shooting landscapes at f/8 or f/11, the sharpness of all lenses are more or less the same. If that's the type of photos you take, you are probably more interested in color rendition, flare, and other things you call the "X-factor". So in essence, you are not wrong in your assessment. However, you also have to realize that PZ isn't wrong in their rating assessment either. It's just a different take under different circumstances with emphasis on different aspects of a particular lens.