http://www.lenstip.com/434.11-Lens_review-Sigma_C_150-600_mm_f_5-6.3_DG_OS_HSM_Summary.html

腾龙在600mm端，中心比适马更锐一点，但是适马在600mm的边缘(APS-C和全幅)上又扳回来一些。

For instance the Tamron is sharper at the longer end of the focal scale in the frame centre but the Sigma performs better on the edge of the APS-C sensor and full frame. The Tamron wins when it comes to the correction of vignetting  but the blurred areas look nicer in the case of the Sigma. In many categories the rivalry between those two ends in a draw – like for example in the case of chromatic aberration, spherical aberration, distortion, coma, astigmatism and the performance against bright light. The Tamron’s optical stabilization is a tad more efficient but the Sigma offers a better accessory kit.

S156C的防抖最大3.0~3.3级，腾龙的防抖更给力一点，能到3.5级。S156S最差，不到3级。

It is clear that the maximum distance between both curves amounts to 3.0-3.3 EV and such is, in our opinion, the tested lens’s stabilization system efficiency. It is a good result but hardly a record-breaking one. What’s interesting the more expensive Sigma S 150–600 mm had a bit worse efficiency (less than 3.0 EV), and the Tamron 150–600 mm was a bit better (3.5 EV).

为什么评测和其他说法不太一样啊，不是说sigma只有2级防抖吗？ C版都有3.3级？！
虽然我自己都是用C版，但是我觉得它评测不太靠谱。

更相信摄友的说法

个人实际使用不是这样的感觉。600光圈全开有肉眼可分辨的差异。防抖我感觉腾龙的总是好像没开似的。