07-06-2013, 02:32 PM
Although many people have said that this lens is soft wide open at 200mm, it still surprised me: only the central part of the image is very soft, and the border part is not soft (see the attached image). In other words, the border looks sharper than the center part by the higher contrast at the border region. I don't understand it. I don't even know if this is normal.
The image was shot with D700. Focal length: 200mm. Aperture: 2.8. Distance: about 1.6m. It turns out that the softness problem at 200mm and f2.8 only occurs at very close distance. For distance larger than 3m, the softness problem goes away and the lens is quite decent wide open at 200mm.
Frank
The image was shot with D700. Focal length: 200mm. Aperture: 2.8. Distance: about 1.6m. It turns out that the softness problem at 200mm and f2.8 only occurs at very close distance. For distance larger than 3m, the softness problem goes away and the lens is quite decent wide open at 200mm.
Frank