Tamron 17-50mm f2.8 XR II LD is an Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage and it is designed to be used with Sony Alpha mount lenses.
Tamron 17-50mm f2.8 XR II LD is compatible with cameras that have Sony Alpha lens mount.
Max sensor coverage of Tamron 17-50mm f2.8 XR II LD is APS-C / DX.
Tamron 17-50mm f2.8 XR II LD has a focal range of 17-50mm and 2.9X zoom ratio. When mounted on a APS-C / DX format camera, it provides an 35mm (FF) equivalent of 25.5 - 75mm.
Tamron 17-50mm f2.8 XR II LD has a Zoom lock feature which eliminates Zoom creep where focal length of the lens changes with gravity when it's held downwards or upwards.
Tamron 17-50mm f2.8 XR II LD has a constant max aperture of f2.8 from 17mm all the way to the 50mm .