Comparison of Canon EF 75-300mm f/4-5.6 III and Canon EF 75-300mm f/4-5.6 III USM [S]ave
| Attribute |  Canon EF 75-300mm f/4-5.6 III × |  Canon EF 75-300mm f/4-5.6 III USM × |
|---|---|---|
| Magnification Ratio (x) | 0.25 | 0.25 |
| Filter Size (mm) | 58 | 58 |
| Front Element Rotation | - | - |
| Closest Focus (m) | 1.5 | 1.5 |
| Type | Telephoto Zoom | Telephoto Zoom |
| Length (mm) | 122 | 122 |
| APS Equivalent | 120 - 480mm | 120 - 480mm |
| Zoom System | Rotary | Rotary |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 75.00 - 300.00 | 75.00 - 300.00 |
| Brand | Canon | Canon |
| Name | Canon EF 75-300mm f/4-5.6 III | Canon EF 75-300mm f/4-5.6 III USM |
| Weight (g) | 480 | 480 |
| Aperture (f) | 4.00 - 45.00 | 4.00 - 45.00 |
| Diaphragm Blades | 7 | 7 |
| Diagonal Angle of View (degree) | 8.30 - 32.20 | 8.30 - 32.20 |
| Lens Construction | 13 elements in 9 groups | 13 elements in 9 groups |
| Diameter (mm) | 71 | 71 |
| Focus Details | Front group rotating extension system with Micromotor | Front group rotating extension system with USM |
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