Canon EF 75-300mm f/4-5.6 III DC EOS Mount 35mm SLR Zoom Lens (p/n 6473A015AA) canon_ef75-300-f4-5.6-iii-usm / 6473A015. This is a zoom lens EF 75-300mm 1:4-5.6 IIIThe optical system, construction, and exterior are the same as the EF 75-300 mm f/4-5.6 III DC.
The difference is that it uses a DC motor instead of a USM to drive the AF.
This has the same optical system, construction, and exterior design as the EF 75-300mm f/4-5.6 III USM lens. Instead of having a USM, it has a micro motor.