About the FR range - it's clear. Stabilizer - when it spins, hands stop shaking, stabilizes by 5+. Sharpness - at 250mm, almost like a razor, if you shoot a smooth border of black and white stripes, then the transition fits into 1-2 pixels, which is amazing. I recommend checking the lens on the price tags in the other side of the store before buying in a store, the quality will be seen.