I am trying to master my D800. Unfortunately, things are not going so good. I am having a hard time getting my shutter speed to handhold my camera.. I shoot a lot of wildlife, mostly birds. I am using a 300mm f2.8 VRII with a teleconverter in some cases. I am getting very soft pictures.. I know this is partially from bad technique and slow shutter speed.. I am wondering if the above will be less affected if a shoot in the DX mode or at least the less pixel FX? Any advice? Thanks.