シグマ 16-300mm f/3.5-6.7 DC OS Contemporary レンズ（Lマウント）

I was worried about image quality with such a wide zoom range, but the three aspherical lenses really control chromatic aberration—my cityscape shots are sharp edge-to-edge.

This lens is surprisingly compact for the zoom range, and the chromatic aberration control is fantastic even wide open. I’ve been able to shoot handheld in low light without ugly fringing, which makes it a keeper for travel.

The three aspheric elements really pull their weight—corner sharpness stays tight even wide open at 16mm, and axial coma is practically a non-issue for night shots. This is the first zoom I've owned that I don't feel the need to swap for primes on most shoots.