Comparison of Panasonic 50mm f/1.4 Lumix S Pro (S-X50) and Pentax 50mm f/1.4 SDM AW HD D FA* [S]ave
| Attribute |  Panasonic 50mm f/1.4 Lumix S Pro (S-X50) × |  Pentax 50mm f/1.4 SDM AW HD D FA* × |
|---|---|---|
| Magnification Ratio (x) | 0.15 | 0.18 |
| Filter Size (mm) | 77 | 72 |
| Focus Details | Internal AF; Double focus system combining linear and stepping motor; AF/MF clutch mechanism | Ring-type SDM (Supersonic Direct-drive Motor) |
| Closest Focus (m) | 0.44 | 0.4 |
| Lens Construction | 13 elements in 11 groups, including 2 aspherical and 3 ED elements; Fluorine coating on front element. | 15 elements in 9 groups, including 3 SLD (Super Low Dispersion) glass elements and 1 aspherical element |
| Length (mm) | 130 | 106 |
| Focal Length (mm) | 50.00 | 50.00 |
| Diaphragm Blades Type | circular | - |
| Brand | Panasonic | Pentax |
| Image Circle | 35mm (L-Mount) | 35mm |
| Name | Panasonic 50mm f/1.4 Lumix S Pro (S-X50) | Pentax 50mm f/1.4 SDM AW HD D FA* |
| Weight (g) | 955 | 910 |
| Type | Standard Prime | Standard Prime |
| Notes | Dust/splash-resistant; Included Accessories: front and rear lens caps, lens hood, storage bag. | Dustproof, weather-resistant construction; Electromagnetic diaphragm |
| APS Equivalent | 75mm | 75mm |
| Aperture (f) | 1.40 - 16.00 | 1.40 - 16.00 |
| Diaphragm Blades | 11 | 9 |
| Diagonal Angle of View (degree) | 47.00 | 47.00 |
| Diameter (mm) | 90 | 80 |
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