Sigma 17-70mm f/2.8-4.5 DC Macro
Tamron AF 17-50mm F/2.8 XR Di-II LD SP ZL Aspherical (IF)
Is 17mm on the Sig the same as 17mm on The Tam. I guess its the macro term that is messing with me.
Macro has nothing to do with field of view. 17mm is 17mm, regardless of lens.