Sigma 17-50mm F2.8 EX DC OS HSM Canon on Canon EOS 7D vs Tamron SP 17-50mm F/2.8 Di II XR VC LD Aspherical IF Canon on Canon EOS 7D vs Canon EF-S 17-55mm f/2.8 IS USM on Canon EOS 7D

选择对比（最多3项）
Sigma 17-50mm F2.8 EX DC OS HSM Canon
Sigma 17-50mm F2.8 EX DC OS HSM Canon

DxOMark 分数
最佳表现于 f=21mm & f/2.8 [?]
16

镜头分数

清晰度 [?]
8 感知Mpix
透光量 [?]
3.1 TStop
畸变 [?]
0.3 %
渐晕 [?]
-0.7 EV
色差 [?]
11 微米
Tamron SP 17-50mm F/2.8 Di II XR VC LD Aspherical IF Canon
Tamron SP 17-50mm F/2.8 Di II XR VC LD Aspherical IF Canon

DxOMark 分数
最佳表现于 f=17mm & f/2.8 [?]
14

镜头分数

清晰度 [?]
10 感知Mpix
透光量 [?]
3.3 TStop
畸变 [?]
0.3 %
渐晕 [?]
-0.7 EV
色差 [?]
6 微米
Canon EF-S 17-55mm f/2.8 IS USM
Canon EF-S 17-55mm f/2.8 IS USM

DxOMark 分数
最佳表现于 f=35mm & f/2.8 [?]
15

镜头分数

清晰度 [?]
9 感知Mpix
透光量 [?]
3.4 TStop
畸变 [?]
0.4 %
渐晕 [?]
-1.1 EV
色差 [?]
6 微米