Comparison of Nikon 16mm f/2.8D AF Fisheye Nikkor and Sigma 8mm f/4 EX DG Circular Fisheye [S]ave
| Attribute |  Nikon 16mm f/2.8D AF Fisheye Nikkor × |  Sigma 8mm f/4 EX DG Circular Fisheye × |
|---|---|---|
| Brand | Nikon | Sigma |
| Name | Nikon 16mm f/2.8D AF Fisheye Nikkor | Sigma 8mm f/4 EX DG Circular Fisheye |
| Focal Length (mm) | 16.00 | 8.00 |
| Image Circle | 35mm | 35mm |
| Diaphragm Blades | 7 | 5 |
| APS Equivalent | 24mm | 1.5x: 12mm; 1.6x: 12.8mm |
| Focus Details | Close Range Correction (CRC); Rear Focusing | - |
| Length (mm) | 56 | 63 |
| Magnification Ratio (x) | 0.1 | 0.07 |
| Closest Focus (m) | 0.25 | 0.2 |
| Notes | Included Accessories: Bayonet filters: L37C, A2, B2, O56 | Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax; Included Accessories: Gelatin Filter Holder, Fitted, Padded Case |
| Aperture (f) | 2.80 - 22.00 | 4.00 - 32.00 |
| Diagonal Angle of View (degree) | 180.00 | 180.00 |
| Weight (g) | 290 | 320 |
| Lens Construction | 8 elements in 5 groups | 10 Elements in 6 Groups |
| Type | Fisheye Prime | Fisheye Prime |
| Diameter (mm) | 64 | 73.5 |
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