Comparison of Pentax 15mm f/4 ED AL Limited HD DA and Sigma 24mm f/3.5 DG DN Contemporary [S]ave
| Attribute |  Sigma 24mm f/3.5 DG DN Contemporary × |  Pentax 15mm f/4 ED AL Limited HD DA × |
|---|---|---|
| Filter Size (mm) | 55 | 49 |
| Notes | Available AF Mounts: L-Mount, Sony E-Mount | Hood is built-in, pullout type; Available in black or silver; High-grade multi-layer HD (High Definition) coating |
| Closest Focus (m) | 0.11 | 0.18 |
| Magnification Ratio (x) | 0.5 | 0.15 |
| Type | Wide Prime | Wide Prime |
| Length (mm) | 48.8 | 39.5 |
| APS Equivalent | 1.5x: 36mm | 23mm |
| Diagonal Angle of View (degree) | 84.10 | 86.00 |
| Image Circle | 35mm | APS-C |
| Focal Length (mm) | 24.00 | 15.00 |
| Brand | Sigma | Pentax |
| Name | Sigma 24mm f/3.5 DG DN Contemporary | Pentax 15mm f/4 ED AL Limited HD DA |
| Weight (g) | 225 | 189 |
| Aperture (f) | 3.50 - 22.00 | 4.00 - 22.00 |
| Diaphragm Blades | 7 | 7 |
| Diaphragm Blades Type | rounded | rounded |
| Lens Construction | 10 elements in 8 groups, with 1 SLD glass and 3 aspherical lenses | 8 elements in 6 groups |
| Diameter (mm) | 64 | 63 |
| Focus Details | Smooth, quiet and high-speed AF via stepping motor | Internal, with "Quick-Shift" focus system |
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