Comparison of Canon EF 300mm f/2.8L IS USM and Canon EF 500mm f/4L IS USM [S]ave
| Attribute |  Canon EF 500mm f/4L IS USM × |  Canon EF 300mm f/2.8L IS USM × |
|---|---|---|
| Aperture (f) | 4.00 - 32.00 | 2.80 - 32.00 |
| Filter Size (mm) | 52 | 52 |
| Notes | Image Stabilization | Image Stabilization; Magnesium alloy lens barrels |
| Closest Focus (m) | 4.5 | 2.5 |
| Magnification Ratio (x) | 0.12 | 0.13 |
| Type | Telephoto Prime | Telephoto Prime |
| Focus Details | Inner focusing; full-time manual focus and USM | Inner focusing; full-time manual focus and USM |
| APS Equivalent | 800mm | 480mm |
| Diaphragm Blades | 8 | 8 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 500.00 | 300.00 |
| Brand | Canon | Canon |
| Name | Canon EF 500mm f/4L IS USM | Canon EF 300mm f/2.8L IS USM |
| Weight (g) | 3870 | 2550 |
| Diagonal Angle of View (degree) | 5.00 | 8.30 |
| Length (mm) | 387 | 252 |
| Diameter (mm) | 146 | 128 |
| Lens Construction | 17 elements in 13 groups, including 1 flourite and 2 UD elements | 17 elements in 13 groups, including 1 flourite and 2 UD elements |
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