The optical system, construction, and exterior are the same as the EF 75-300 mm f/4-5.6 III USM’s. 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: 32º 11' - 8º 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. / 71.0 x 122mm, 480g