Comparison of Pentax SMC P-D FA 50mm f/2.8 Macro and Sony 55mm ƒ/1.8 ZA Carl Zeiss Sonnar T* SEL55F18Z [S]ave
| Attribute |  Sony 55mm ƒ/1.8 ZA Carl Zeiss Sonnar T* SEL55F18Z × |  Pentax SMC P-D FA 50mm f/2.8 Macro × |
|---|---|---|
| Aperture (f) | 1.80 - 22.00 | 2.80 - 32.00 |
| Diagonal Angle of View (degree) | 43.00 | 47.00 |
| Magnification Ratio (x) | 0.14 | 1 |
| Filter Size (mm) | 49 | 49 |
| Type | Standard Prime | Standard Prime Macro |
| Closest Focus (m) | 0.5 | 0.2 |
| APS Equivalent | 82.5mm | 75mm |
| Notes | Included Accessories: ALC-SH129 Lens Hood | - |
| Image Circle | 35mm (Full-frame E-Mount) | 35mm |
| Focal Length (mm) | 55.00 | 50.00 |
| Brand | Sony | Pentax |
| Name | Sony 55mm ƒ/1.8 ZA Carl Zeiss Sonnar T* SEL55F18Z | Pentax SMC P-D FA 50mm f/2.8 Macro |
| Weight (g) | 281 | 265 |
| Diameter (mm) | 64.4 | 67.5 |
| Diaphragm Blades | 9 | 8 |
| Focus Details | Linear motor | - |
| Length (mm) | 70.5 | 60 |
| Diaphragm Blades Type | rounded | - |
| Lens Construction | 7 elements in 5 groups with 3 apheric elements | 8 elements in 7 groups |
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