Sony "Carl Zeiss" 16-35 f/2.8
Minolta 24-105 f/3.5-4.5
Sigma 12-24mm f/4.5-5.6 EX.
Presenting the results starts to be a bit more difficult, so I decided to write a table with reduced-size pictures. You need to click the pictures to see the full resolution. It should open in a new window (or new tab if you use them). This make it easier to open a few pictures and flip between them for comparison. Personally, I use tabs so I just need to click on them to flip back and for between the pictures I want to compare. The name of the pictures gives lens, focal length and aperture.
Here the center pictures:
f-stop | Sony CZ 16-35 | Minolta 24-105 | Sigma 12-24 |
f/2.8 |  | ||
f/4 |  |  | |
f/5.6 |  |  |  |
f/8 |  |  |  |
f/11 |  |  |  |
At f/11, all 3 lenses give identical results. At f/8, we can probably only tell the difference because the magnification is so high.
The CZ already attains maximum sharpness at f/4. The contrast is higher than the other lenses.
Still, when taking pictures in daylight, there is nothing wrong with f/8 which makes all three lenses perfectly usable for landscape pictures. The Minolta 24-105, in particular is small and light, which makes it an ideal travel lens. How is it in the corners and at other focal lengths?
Next: corner performance.
