Upload & Sell: Off
This is a small shootout with some zoom lenses covering the 180 mm focal length. I wanted to do it because I have too many of them, for different mounts, and want to know how they stand before deciding what has to go. For reference, I used the Leica APO-Telyt R 180 3.4.
The distance chosen was ~infinity, because that is where I most often use them.
In order to be able to compare these lenses for different mounts, I used the NEX 7 camera with adapters. I wanted to compare at both image center and edge, but issues with adapter decentering and field curvature made it more difficult than I thought, so for this time only the result as image center can be presented.
Raw files developed in Capture One Pro 7, with all noise reduction and sharpening set to zero. Exposure was fine adjusted in software to an equal luminance value for a bright grey patch. White balance was with identical setting for all images, this means that contrast and color is directly comparable.
Focus point was the roof on the yellow house, and focus criterion was maximum focus peaking in maximum magnification with the lens at maximum aperture. All series were shot three times with refocusing, and the results were very consistent. The whole image files were checked for possible front or back focus issues or focus shift, but such probems were not identified to any degree that would invalidate the results.
These are the contenders:
Leica APO-Telyt R 180 3.4
Canon 70-200 2.8 IS II
Canon 70-200 4 IS
Sigma 100- 300 4 APO HSM
Sony 70-300 4.5 - 5.6 G SSM
Nikon AF-S 28-300 3.5 -5.6 G VR
These are 100% crops mounted side by side, for a range of apertures. They can be opened in separate tabs if you want to swith easily between apertures.
Full image, resized
And embedded the results at f/5.6 so if you are lazy you don't have to open the links: