Comparison of Olympus 50mm f/2 Zuiko Digital Macro and Pentax 55mm ƒ/1.4 SDM SMC DA* [S]ave
| Attribute |  Pentax 55mm ƒ/1.4 SDM SMC DA* × |  Olympus 50mm f/2 Zuiko Digital Macro × |
|---|---|---|
| Notes | Included Accessories: Lens Hood | Includes Lens Hood (LH-55) and Lens Case (LSC-0814); Compatible with EX-25 Extension Tube |
| Aperture (f) | 1.40 - 22.00 | 2.00 - 22.00 |
| Magnification Ratio (x) | 0.17 | 0.5 |
| Filter Size (mm) | 58 | 52 |
| APS Equivalent | 83mm | - |
| Type | Standard Prime | Telephoto Prime Macro |
| Diaphragm Blades | 9 | 7 |
| 35mm Equivalent | - | 100mm |
| Image Circle | APS-C | Image Circle |
| Focal Length (mm) | 55.00 | 50.00 |
| Brand | Pentax | Olympus |
| Name | Pentax 55mm ƒ/1.4 SDM SMC DA* | Olympus 50mm f/2 Zuiko Digital Macro |
| Weight (g) | 375 | 300 |
| Diagonal Angle of View (degree) | 28.60 | 24.00 |
| Lens Construction | 9 elements in 8 groups | 11 elements in 10 groups, including 1 ED element |
| Diameter (mm) | 70.5 | 71 |
| Length (mm) | 66 | 61.5 |
| Focus Details | SDM (supersonic motor), AF/MF switch | - |
| Closest Focus (m) | 0.45 | 0.24 |
| Diaphragm Blades Type | rounded | - |
| Front Element Rotation | - | - |
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