最近,我take some portait lately. The main lenses I have tried are: 17-55mm F2.8 on D300, 70-200mm VR II, 85mm 1.4D, 85mm 1.4G and 105mm F2.8 Macro. I am selling the 17-55mm and the 85mm 1.4D as the results.
The sharpest one is probably the 105mm. However, in indoor studio where only modeling lights are available, the F2.8 lenses will have problem hitting on focus. They hunt a little.
The next is the 85mm 1.4G. The G version is useable at F1.4 and gets very sharp at F2. It could lock the focus with minimal light.
The 70-200mm comes in third in term of sharpness. It also needs the most room to focus. When you are shooting indoor, you just don't have much room to back out.
Overall, I use the 85mm 1.4G most of time when shooting indoor. I am very impressed with this lens.
Would love to hear comparison of this 85mm 1.4 G Vs. the 200mm F2 VR. I might end up selling the 70-200mm to get a 200mm F2.