Question about Tamron 16-300mm f/3.5-6.3 Di II VC PZD, Canon EF-S

My forewriter "Plagioklas" has answered correctly. The Tamron 16-300mm can be mounted on the EOS5D MarkII with the bojonet. The EOS 5D Mark III is a full-frame camera and requires EF lenses. The Tamron 16-300 corresponds to the Canon EF-S series which is only suitable for the smaller image chip (APS-C). Please refer to the operating instructions of your EOS 5D MIII to find out whether the camera settings can be changed so that EF-S lenses can also be used. If this is possible, the result will certainly be a cropfactor of 1.6, which means that the angle of view of the lens then corresponds to that of a full-frame 27 - 480mm. In addition, this results in a reduction of the exposed area of the image chip and thus a reduction of the maximum possible pixels. The reduction of the maximum possible pixels in combination with the optically weaker lens is not an ideal combination!

Other lens combinations are recommended for the EOS 5D MarkIII!

The Tamron 16-300 is ideal if, despite digital mirror reflex (with APS-C chip size), the largest possible focal length range is to be covered with little weight and storage space and documentation is more important than absolute image quality.

It fits on the camera but is not suitable for the full-frame sensor. Why not take the Tamron 28-300 F/3.5 - 6.3.