Comparison of Canon EF 400mm f/2.8L IS III USM and Sony 300mm f/2.8 G SSM II SAL300F28G2 [S]ave
| Attribute |  Canon EF 400mm f/2.8L IS III USM × |  Sony 300mm f/2.8 G SSM II SAL300F28G2 × |
|---|---|---|
| Filter Size (mm) | 52 | 42 |
| Notes | Image Stabilization (up to 5-stops of correction); Dust- and water-resistant construction; Detachable, rotatable tripod collar. | Thanks to a new LSI drive circuit, the SAL-300F28GII offers faster, more accurate autofocusing with four times faster object tracking performance tha |
| Closest Focus (m) | 2.5 | 2 |
| Magnification Ratio (x) | 0.17 | 0.18 |
| Type | Telephoto Prime | Telephoto Prime |
| Length (mm) | 343 | 242.5 |
| APS Equivalent | 640mm | 450mm |
| Diagonal Angle of View (degree) | 6.20 | 8.20 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 400.00 | 300.00 |
| Brand | Canon | Sony |
| Name | Canon EF 400mm f/2.8L IS III USM | Sony 300mm f/2.8 G SSM II SAL300F28G2 |
| Weight (g) | 2840 | 2340 |
| Aperture (f) | 2.80 - 32.00 | 2.80 - 32.00 |
| Diaphragm Blades | 9 | 9 |
| Diaphragm Blades Type | circular | rounded |
| Lens Construction | 17 elements in 13 groups, including 2 fluorite elements and one super UD element; Super Spectra Coating (SSC); Air Sphere Coating (ASC) | 13 elements in 12 groups, including 3 ED elements |
| Diameter (mm) | 163 | 122 |
| Focus Details | Inner focusing; full-time manual focus and Ring USM; Customizable Electronic Focusing Ring; 2 Focus Presets; | Internal; SSM (Super Sonic wave Motor) with Direct Manual Focus (2 modes), Focus Hold button, Focus Range selector, Prefocus function |
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