Sigma 10–20mm F3.5 EX DC HSM vs Tamron SP 150-600mm

The middle of its images are great, but those corners really are important on any wide-angle lens, and they just turned out to be a bit poor in this c...

It's not a lot, but since the zoom ring is stiff turning the zoom ring would slightly rotate the entire lens a tiny bit. The focus distance window also seems to be completely inaccurate - I was photographing a deer about 30-40ft away, but the window was stating it was 100ft away. The soft bag it comes with protects the lens somewhat, but is more flexible than the stock Nikon bags, and that makes it more difficult to stuff the lens back in since it keeps collapsing and folding over itself. Lastly, the wide angle lock switch seems somewhat unnecessary, as the zoom ring already functions as a lens lock if you push it forward, while the switch only works at 150mm

Not loose on the camera, but the lens itself feels loose from the zoom. I can still use the lens, but I'm scared it will eventually break.

We get some pincushion distortion and noticeably dark corners. Stop the aperture down to f/8 and those corners brighten up throughout the zoom range t...

The thing feels like a pro-grade piece of kit. I'm extremely disappointed with its autofocus, specifically how loud and "clanky" it is. It very well could be the individual product that I have received. I have had good experiences with Sigma before

You're kidding. The Tamron SP is better than both of these two. The Canon's only advantage is that it will have the fastest AF but only beating the Tamron by a little. The Tamron has better transmission than both, better CA control, actual 3+ axis stabilization, weather seals the Sigma can't match

like for what it is you know, within obviously reason and comparing it to similarly priced and similarly performing lenses. But yeah, if you like this...

The lens performed ok, giving me usable shots, but still seems the detail isn't quite there. I took the lens to a local dealer with an Tamron representative and they gave me tips on trying to get the best picture possible ,but even they admit the lens might have to go back. Some how I have acquired lots of dust behind the front element. looking at the side of my lens it appears my lens it cupped which could be a factor in all this

Autofocus is a little slow and loud but very manageable. Combined with Sigma's quality Japanese construction and the hefty weight, this lens yields very good picture quality for the value.

That's a big savings in weight for photographers wanting a lens that can be used in all types of weather without worry, not to mention price—the Tamron G2 is $600 less than the high-end Sigma Sports 150-600mm. The cost of front filters is less, as well, as the Tamron uses 95mm front filters while the Sigma Sports requires the larger, more expensive 105mm variety. A reversible lens hood is included.