Comparison of Canon EF 28-135mm f/3.5-5.6 IS USM and Sigma 18-125mm f/3.8-5.6 DC OS HSM [S]ave
| Attribute |  Canon EF 28-135mm f/3.5-5.6 IS USM × |  Sigma 18-125mm f/3.8-5.6 DC OS HSM × |
|---|---|---|
| Filter Size (mm) | 72 | 67 |
| Notes | Image Stabilization | Image Stabilization; Available AF mounts: Sigma, Canon, Nikon, Pentax, Sony |
| Closest Focus (m) | 0.5 | 0.35 |
| Magnification Ratio (x) | 0.19 | 0.26 |
| Type | Standard Zoom | Standard Zoom |
| Length (mm) | 97 | 88.5 |
| APS Equivalent | 45 - 216mm | 1.5x: 27 - 188mm; 1.6x: 29 - 200mm |
| Zoom System | Rotary | Rotary |
| Image Circle | 35mm | Image Circle |
| Focal Length (mm) | 28.00 - 135.00 | 18.00 - 125.00 |
| Brand | Canon | Sigma |
| Name | Canon EF 28-135mm f/3.5-5.6 IS USM | Sigma 18-125mm f/3.8-5.6 DC OS HSM |
| Weight (g) | 540 | 505 |
| Aperture (f) | 3.50 - 36.00 | 3.80 - 22.00 |
| Diaphragm Blades | 6 | 7 |
| Diagonal Angle of View (degree) | 18.00 - 75.00 | 11.40 - 69.30 |
| Lens Construction | 16 elements in 12 groups, including 1 aspherical element | 16 elements in 12 groups, including SLD and aspherical elements |
| Diameter (mm) | 78 | 74 |
| Focus Details | Inner focusing; full-time manual focus and USM | Internal, with HSM |
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