The optical system, construction, and exterior are the same as the EF 75-300 mm f/4-5.6 III USMs. The difference is that it uses a DC motor instead of a USM to drive the AF.
| Focal Length & Maximum Aperture | 75-300mm 1:4-5.6 |
| Lens Construction | 13 elements in 9 groups |
| Diagonal Angle of View | 32 11' - 8 15' |
| Focus Adjustment | Front group rotating extension system with Micromotor |
| Closest Focusing Distance | 1.5m/ 4.9 ft. |
| Filter Size | 58mm |
| Max. Diameter x Length, Weight | 2.8" x 4.8", 16.8 oz. / 71mm x 122mm, 480g |