To stop down, or not stop down?
I shoot with either the Nikon 18-200VR, or the potent 17-55 F2.8 on a Nikon D300, or Finepix S2 Pro. My question is about lens diffraction when stopping down. I love to shoot detailed landscapes and I need deep DOF for either the foreground, or the background. Recently, while perusing a few magazines I noticed many photographers, shooting digital and stopping down to the likes of F22, F32 etc. If we do that, and there is some slight defraction and subsequent softness in the final image will sharpening bring that back? Or, should we stick to not stopping down to those extremes?