Comparison of Canon EF 400mm f/4 DO IS USM and Canon EF 600mm f/4L IS III USM [S]ave
| Attribute |  Canon EF 600mm f/4L IS III USM × |  Canon EF 400mm f/4 DO IS USM × |
|---|---|---|
| Filter Size (mm) | 52 | 52 |
| Notes | Image Stabilization (up to 5-stops of correction); Dust- and water-resistant construction; Detachable, rotatable tripod collar. | Image Stabilization |
| Closest Focus (m) | 4.2 | 3.5 |
| Magnification Ratio (x) | 0.15 | 0.12 |
| Type | Telephoto Prime | Telephoto Prime |
| Focus Details | Inner focusing; full-time manual focus and Ring USM; Customizable Electronic Focusing Ring; 2 Focus Presets; | Inner focusing; full-time manual focus and USM |
| APS Equivalent | 960mm | 640mm |
| Diameter (mm) | 168 | 128 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 600.00 | 400.00 |
| Brand | Canon | Canon |
| Name | Canon EF 600mm f/4L IS III USM | Canon EF 400mm f/4 DO IS USM |
| Weight (g) | 3050 | 1940 |
| Aperture (f) | 4.00 - 32.00 | 4.00 - 32.00 |
| Diaphragm Blades | 9 | 8 |
| Diagonal Angle of View (degree) | 4.20 | 6.20 |
| Length (mm) | 448 | 233 |
| Diaphragm Blades Type | circular | - |
| Lens Construction | 17 elements in 13 groups, including 2 fluorite elements and one super UD element; Super Spectra Coating (SSC); Air Sphere Coating (ASC) | 17 elements in 13 groups, including 1 flourite and 1 DO element |
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