Comparison of Canon EF-S 17-85mm f/4-5.6 IS USM and Pentax 16-85mm f/3.5-5.6 ED DC WR DA [S]ave
| Attribute |  Pentax 16-85mm f/3.5-5.6 ED DC WR DA × |  Canon EF-S 17-85mm f/4-5.6 IS USM × |
|---|---|---|
| Aperture (f) | 3.50 - 38.00 | 4.00 - 32.00 |
| Filter Size (mm) | 72 | 67 |
| Notes | HD Coating, SP (Super Protect) Coating, Weather-Resistant, Quick-shift Focus, Filter Window | EF-S lens mount, exclusively for EOS 20D, Digital Rebel, and newer bodies with APS-C sensors. |
| Closest Focus (m) | 0.35 | 0.35 |
| Magnification Ratio (x) | 0.26 | 0.2 |
| Diameter (mm) | 78 | 78 |
| Type | Standard Zoom | Standard Zoom |
| APS Equivalent | 24.5 - 130mm | 27 - 136mm |
| Diaphragm Blades | 7 | 6 |
| Image Circle | APS-C | APS-C |
| Focal Length (mm) | 16.00 - 85.00 | 17.00 - 85.00 |
| Brand | Pentax | Canon |
| Name | Pentax 16-85mm f/3.5-5.6 ED DC WR DA | Canon EF-S 17-85mm f/4-5.6 IS USM |
| Weight (g) | 517 | 475 |
| Diagonal Angle of View (degree) | 19.00 - 83.00 | 18.40 - 78.50 |
| Lens Construction | 16 elements in 12 groups, including 1 extra-low dispersion glass element and 3 aspherical elements | 17 elements in 12 groups, including 1 aspherical element |
| Zoom System | Rotary | Rotary |
| Length (mm) | 94 | 92 |
| Diaphragm Blades Type | rounded | - |
| Focus Details | Quick-Shift system for fast changing between auto and manual focusing, with ability to manually override focus at any point | Inner focusing; full-time manual focus and USM |
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