| AF | Auto Focus |
| ASP | Aspherical lenses. Provides distortion-free images with image reproduction performance equivalent to that of a single focal length lens. Aspherical lenses allow the production of high-quality images from compact, lightweight telephoto zoom lenses. |
| DG | These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs. |
| EX | The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance. |
| DF | Dual Focus System. Disengages the linkage between the internal focusing mechanism and outer focusing ring when the focusing ring is moved to the AF position |