Comparison of Pentax SMC P-FA 50mm f/2.8 Macro and Sigma 65mm f/2 DG DN Contemporary [S]ave
| Attribute |  Sigma 65mm f/2 DG DN Contemporary × |  Pentax SMC P-FA 50mm f/2.8 Macro × |
|---|---|---|
| Diagonal Angle of View (degree) | 36.80 | 47.00 |
| Diameter (mm) | 72 | 67.5 |
| Filter Size (mm) | 62 | 52 |
| Aperture (f) | 2.00 - 22.00 | 2.80 - 32.00 |
| Type | Tele Prime | Standard Prime Macro |
| Magnification Ratio (x) | 0.15 | 1 |
| APS Equivalent | 1.5x: 97.5mm | 75mm |
| Notes | Available AF Mounts: L-Mount, Sony E-Mount | - |
| Image Circle | 65mm | 35mm |
| Focal Length (mm) | 65.00 | 50.00 |
| Brand | Sigma | Pentax |
| Name | Sigma 65mm f/2 DG DN Contemporary | Pentax SMC P-FA 50mm f/2.8 Macro |
| Weight (g) | 405 | 386 |
| Diaphragm Blades | 9 | - |
| Lens Construction | 12 elements in 9 groups, with 1 SLD glass and 2 aspherical lenses | 8 elements in 7 groups |
| Focus Details | Smooth, quiet and high-speed AF via stepping motor | - |
| Length (mm) | 74.7 | 71 |
| Diaphragm Blades Type | rounded | - |
| Closest Focus (m) | 0.55 | 0.15 |
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