After shooting with SIGMA 18-250 for 3 years, NIKON finally releases the 18-300 f3.5-5.6, superior to the SIGMA and TAMRON 18-2xx f3.5-6.3 lenses. Too late for me to care. I'll wait for a more dramatic technological improvement from SIGMA or TAMRON. For NIKON owners wanting the 18-300 focal length today, get yourself the NIKON 18-300, about $1,000. Any rumors on SIGMA or TAMRON announcements?