The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary ($1,089) is a big, heavy lens. But that's no surprise when you consider its maximum reach, full-frame sensor coverage, and sturdy build.
Excellent telephoto reach; Very sharp; Includes tripod collar and lens hood; Focuses quickly; Effective image stabilization system; Zoom locking mechanism; Affordable
Some chromatic aberration; Moderate pincushion distortion; Relatively narrow aperture; Heavy; Not fully dust- and splash-proof