Comparison of Canon EF 17-40mm f/4L USM and Panasonic 16-35mm f/4 Lumix S Pro (S-R1635) [S]ave
| Attribute |  Panasonic 16-35mm f/4 Lumix S Pro (S-R1635) × |  Canon EF 17-40mm f/4L USM × |
|---|---|---|
| Aperture (f) | 4.00 - 22.00 | 4.00 - 22.00 |
| Filter Size (mm) | 77 | 77 |
| Notes | Splash- and dust-resistant. Included Accessories: front and rear lens caps, lens hood, storage bag. | Dust and moisture resistant |
| Closest Focus (m) | 0.25 | 0.28 |
| Magnification Ratio (x) | 0.23 | 0.24 |
| Diameter (mm) | 85 | 83.5 |
| Type | Wide Zoom | Wide Zoom |
| APS Equivalent | 24 - 52.5mm | 27 - 64mm |
| Diaphragm Blades | 9 | 7 |
| Image Circle | 35mm (L-Mount) | 35mm |
| Focal Length (mm) | 16.00 - 35.00 | 17.00 - 40.00 |
| Brand | Panasonic | Canon |
| Name | Panasonic 16-35mm f/4 Lumix S Pro (S-R1635) | Canon EF 17-40mm f/4L USM |
| Weight (g) | 500 | 500 |
| Diagonal Angle of View (degree) | 63.00 - 107.00 | 57.50 - 104.00 |
| Lens Construction | 12 elements in 9 groups, including 1 UHR (Ultra-High Refractive Index), 1 ED and 3 aspherical elements; Fluorine coating on front element. | 12 elements in 9 groups, including 3 aspherical elements and 1 S-UD element |
| Zoom System | Rotary | Rotary |
| Length (mm) | 99.6 | 96.8 |
| Diaphragm Blades Type | circular | - |
| Focus Details | Internal with double-magnet linear motor; AF/MF clutch mechanism | Inner focusing; full-time manual focus and USM; |
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