Comparison of Sigma Macro 105mm f/2.8 EX DG and Tamron SP AF 90mm f/2.8 Di Macro 1:1 [S]ave
| Attribute |  Sigma Macro 105mm f/2.8 EX DG × |  Tamron SP AF 90mm f/2.8 Di Macro 1:1 × |
|---|---|---|
| Aperture (f) | 2.80 - 45.00 | 2.80 - 32.00 |
| Filter Size (mm) | 58 | 55 |
| Notes | Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax, Four-Thirds; Included Accessories: Lens Hood | Available mounts: Canon, Minolta, Nikon, Pentax; Includes lens hood and case. |
| Closest Focus (m) | 0.31 | 0.29 |
| Magnification Ratio (x) | 1 | 1 |
| Type | Telephoto Prime Macro | Telephoto Prime Macro |
| Focus Details | Dual Focus mechanism with limiter | External focus system, lens length varies while focusing |
| APS Equivalent | 1.5x: 157.5mm; 1.6x: 168mm | 1.5x: 135mm; 1.6x: 144mm |
| Diaphragm Blades | 8 | 9 |
| Image Circle | 35mm | Image Circle |
| Focal Length (mm) | 105.00 | 90.00 |
| Brand | Sigma | Tamron |
| Name | Sigma Macro 105mm f/2.8 EX DG | Tamron SP AF 90mm f/2.8 Di Macro 1:1 |
| Weight (g) | 457 | 405 |
| Diagonal Angle of View (degree) | 23.30 | 27.00 |
| Length (mm) | 97.5 | 97 |
| Diameter (mm) | 74 | 71.5 |
| Lens Construction | 11 elements in 10 groups | 10 elements in 9 groups |
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