I purchased this lens to replace my Tamron 150-600 (1st Gen). The Tamron lens cost me quite a few wildlife shots because of it's abhorrent focusing speed on moving objects, so I steeped up to the Sigma 150-600mm Sport.
First off, this is a large, metal lens, so yes, it's heavy, but if you've ever used a super telephoto or large prime lens, the weight won't be too much of a shock.
This lens is as solid as it gets. It's extremely solid and well made. For some reason, though, this lens doesn't come with a lens cap. It comes with a large, cloth cover that goes around the top third of the lens. While it offers adequate protection, it is cumbersome when changing lenses out in the field, because that ginormous lens cover ain't gonna easily fit into your pocket. The lens hood is metal and extremely easy to apply. You simply place it over the lens and secure it with a thumb screw (knob), no more twisting the hood, trying to line up the grooves on the lens.
The focus speed on this lens is incredible! The lens has several focusing modes, that are customizable with the proprietary Sigma USB dock (sold separately). The dock allows you to adjust several settings, as well as update the firmware on the lens. No more sending it away to have it recalibrated. Do it yourself.
This a great lens for shooting birds, wildlife or sporting events. It's pricey compared to the Tamron G2 150-600, but the Sigma is a solid lens, and does what I need it to do.
- Super fast focusing speed
- Solid metal construction
- Customizable features (with USB dock)
- Metal lens hood (won't break like plastic versions)
- No lens cap
- More expensive than it's contemporaries.