Comparison of Panasonic 20mm f/1.7 II ASPH LUMIX G and Pentax SMC DA 40mm ƒ/2.8 XS [S]ave
| Attribute |  Panasonic 20mm f/1.7 II ASPH LUMIX G × |  Pentax SMC DA 40mm ƒ/2.8 XS × |
|---|---|---|
| Aperture (f) | 1.70 - 16.00 | 2.80 - 22.00 |
| Diaphragm Blades Type | rounded | rounded |
| Filter Size (mm) | 46 | 27 |
| Notes | Included Accessories: lens caps, storage bag. Available in black or silver. | 27mm objective cap and rear cap included. |
| APS Equivalent | - | 61mm |
| Type | Wide Prime | Standard Prime |
| Diaphragm Blades | 7 | 9 |
| 35mm Equivalent | 40mm | - |
| Image Circle | Image Circle | APS-C |
| Focal Length (mm) | 20.00 | 40.00 |
| Brand | Panasonic | Pentax |
| Name | Panasonic 20mm f/1.7 II ASPH LUMIX G | Pentax SMC DA 40mm ƒ/2.8 XS |
| Weight (g) | 87 | 51 |
| Diagonal Angle of View (degree) | 57.00 | 39.00 |
| Lens Construction | 7 elements in 5 groups, including 2 aspherical elements | 5 elements in 4 groups |
| Diameter (mm) | 63 | 62.9 |
| Closest Focus (m) | 0.2 | 0.4 |
| Front Element Rotation | - | - |
| Length (mm) | 25.5 | 9.2 |
| Focus Details | - | AF or MF |
| Magnification Ratio (x) | 0.13 | 0.13 |
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