I think this lens would get heavy quick, if you are shooting handheld.
Sigma 150-600 Vs. Tamron 150-600
Same focal length for (almost) the same brightness, but also takes most of the similarities end. Sigma's version is not only expensive, it also visibly better image quality throughout the zoom range, and most noticeable difference from 500mm and upwards where Tamron lose more sharpness. Sigman, however, is larger and heavier, but at the same time feels more professional and thorough. It also noticeably less chromatic aberration and slightly less distortion, and a little better results when incident sunlight. Other differences are that the Tamron lacks focus limitation and pan for stabilization Manifold Tamron is that it vinjetterar less and gives maximum aperture of f / 5.6 at 400mm while the Sigma gives f / 6th I also got the feeling that Sigma's image stabilization was not quite as effective as the Tamron, but it can also have and do with that Sigman is larger and heavier, which makes it all the more difficult to keep still. Tamronen I could hand hold at 1 / 60s at the longest focal length, while Sigman I was forced to choose about 1 step faster shutter speed to not get camera shake, advantage Tamron therefore, if you will use the lens handheld. In addition, the price difference is so big (today 10990kr vs. 16490kr) that both are Top class based on its price.