Comparison of Carl Zeiss 18mm f/3.5 Distagon T* 3.5/18 and Pentax SMC P-FA 24mm f/2 [S]ave
| Attribute |  Carl Zeiss 18mm f/3.5 Distagon T* 3.5/18 × |  Pentax SMC P-FA 24mm f/2 × |
|---|---|---|
| Brand | Carl-zeiss | Pentax |
| Name | Carl Zeiss 18mm f/3.5 Distagon T* 3.5/18 | Pentax SMC P-FA 24mm f/2 |
| Focal Length (mm) | 18.00 | 24.00 |
| Image Circle | 35mm | 35mm |
| Lens Construction | 13 elements in 11 groups | 11 elements in 9 groups |
| APS Equivalent | 1.5x: 27mm | 36mm |
| Closest Focus (m) | 0.3 | 0.3 |
| Diameter (mm) | 87 | 74 |
| Filter Size (mm) | 82 | 67 |
| Magnification Ratio (x) | 0.083 | - |
| Notes | Available SLR mounts: Canon EF (ZE), Nikon F (ZF, ZF.2), Pentax K (ZK). Lens shade included. Nikon ZF.2 version includes CPU interface for autoexposu | - |
| Aperture (f) | 3.50 - 22.00 | 2.00 - 22.00 |
| Length (mm) | 84 | 66 |
| Weight (g) | 470 | 405 |
| Focus Details | Manual focus only | - |
| Type | Wide Prime | Wide Prime |
| Diagonal Angle of View (degree) | 99.00 | 84.00 |
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