Is the Nikon 85mm f/3.5G AF-S DX VR Micro Nikkor Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 85mm f/8.0 test image. Observe the contrast and resolution of these results.
Is the Nikon 85mm f/3.5G AF-S DX VR Micro Nikkor Lens set to 85mm f/8.0 sharper than the Sigma 150mm f/2.8 EX DG APO HSM Macro Lens set to 150mm f/2.8? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.