Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Amazing quality for the price

Having just entered the modern era of digital SLR's I'm completely pleased with the quality, convenience and design of this lens. I had taken some air show and portrait shots but I felt the real test came at the inaugural IRL road course race at Infineon Raceway this summer. The lens behaved without flaw both in and out of the sun as I panned through turns three, four and five. A must have for any *ist owner.