Comparison of Nikon 18mm f/2.8D AF Nikkor and Tokina 17mm f/3.5 AT-X 17 AF PRO Aspherical [S]ave
| Attribute |  Tokina 17mm f/3.5 AT-X 17 AF PRO Aspherical × |  Nikon 18mm f/2.8D AF Nikkor × |
|---|---|---|
| Aperture (f) | 3.50 - 22.00 | 2.80 - 22.00 |
| Filter Size (mm) | 77 | 77 |
| Notes | Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Flower type lens hood | Included Accessories: Hard Case CL-47 |
| Closest Focus (m) | 0.25 | 0.25 |
| Magnification Ratio (x) | 0.11 | 0.11 |
| Type | Wide Prime | Wide Prime |
| Focus Details | Internal with Focus Clutch mechanism | Rear Focusing |
| APS Equivalent | 1.5x: 25.5mm; 1.6x: 27.2mm | 27mm |
| Diaphragm Blades | 7 | 7 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 17.00 | 18.00 |
| Brand | Tokina | Nikon |
| Name | Tokina 17mm f/3.5 AT-X 17 AF PRO Aspherical | Nikon 18mm f/2.8D AF Nikkor |
| Weight (g) | 435 | 385 |
| Diagonal Angle of View (degree) | 103.70 | 100.00 |
| Length (mm) | 57 | 58 |
| Diameter (mm) | 84 | 82 |
| Lens Construction | 11 elements in 9 groups, including 1 aspherical element | 13 elements in 10 groups, including 1 aspherical element |
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