I am thinking of doing something really dumb or really enlightened. I have avoided the smaller APS lenses because of my belief that larger sensors will be here in a few years. I hold onto lenses forever. But I saw two excellent lenses at an affordable price that are just what I have been thinking of:
Sigma 10-20mm F4-5.6 EX DC HSM (available soon)
Tokina AT-X124 Pro DX 12-24mm f/4 (would be my first choice)
Both are APS lenses. The test reports I've seen look good and they run about $500 each.
So, would I be making a horrible mistake committing to an APS lens or am I showing good judgment in the face of inevitable change? Would YOU spend $500 on an APS lens? Opinions?