Canon EF 400mm f/5.6L USM
| Maker | Canon |
| Model | EF 400mm f/5.6L USM |
| Fullframe Coverage | YES |
| Field of View
(degrees) Horizontal,Vertical, Diagonal Full Frame - 36x24mm APS-C - 22.5x15mm |
Full Frame : H - 5.2 : V - 3.4 : D - 6.2 APS-C : H - 3.2 : V - 2.1 : D - 3.9 |
| Focal Length Prime | 400 mm (APS-C 35mm equiv = 640 mm) |
| Aperture Range Prime | f5.6 - f32 |
| Motor | Ring USM |
| Elements/Groups | 7/6 |
| Diaphragm blades | 8 |
| Close Focus | 3.5 m : 11.5 ft |
| Maximum Magnification | 0.12x |
| Length/Diameter | 10.1"/3.5" : 256.5 mm / 88.9 mm |
| Weight | 44.8 oz : 1272.3 gm |
| Filter | 77 |
| Status | current |
| LensPlay Rating | 9 - Very Good |
| User Rating # of ratings = 144 |
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| Price (click for latest pricing) | $1100 |
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COMMENTS: A favorite lens of bird photographers to shoot birds in flight. It's small and light enough to hand hold and the AF is fast and accurate. Though f5.6 is not very fast, it's fast enough, especially with digital SLRs which can give very good results even at ISO 800
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