| Attribute | Value |
|---|---|
| Focus Details | Quick-shift Focus; DC focus motor |
| Diameter | 71 mm |
| Zoom System | Rotary |
| Diagonal Angle of View | 39.00 - 70.00 degree |
| Diaphragm Blades Type | rounded |
| Aperture | 2.80 - 32.00 f |
| Notes | HD coating, SP (Super Protect) coating; Weather-resistant construction |
| Filter Size | 55 mm |
| Magnification Ratio | 0.2 x |
| Closest Focus | 0.28 m |
| Length | 68.5 mm |
| Lens Construction | 9 elements in 8 groups, including 1 ED and 1 SLD element |
| Diaphragm Blades | 9 |
| APS Equivalent | 30.5 - 61.5mm |
| Focal Length | 20.00 - 40.00 mm |
| Image Circle | APS-C |
| Brand | Pentax |
| Name | Pentax 20-40mm ƒ/2.8-4 ED Limited DC WR HD DA |
| Weight | 283 g |
| Type | Standard Zoom |
| 35mm Equivalent | Add |
| Effective Reduction in Aperture | Add |
| Focal Length Multiplier | Add |
| APS-C Equivalent | Add |
| Front Element Rotation | Add |