Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF vs Sigma EX 20mm F1.8 DG ASP RF
This is a full comparison between the lenses Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF and Sigma EX 20mm F1.8 DG ASP RF.
Compare Specifications
Product |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Name | Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF | Sigma EX 20mm F1.8 DG ASP RF |
| Manufacturer | Tamron | Sigma |
| SKU | ||
Release Date and Price |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Release Year | 2006 | 2008 |
| Release Date | ||
| MSRP | N/A | 670 USD |
| Buy it today |
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Lens Type |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Lens Type | Standard / Normal | Wide Angle Lens |
| Zoom or Prime | Zoom lens | Prime lens (no zoom) |
Mount and Compatibility |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Mount | Canon EF-SNikon F | Canon EFNikon F |
| Designed for APS-C sensor | Yes | No (Suitable for all sensors) |
Focus |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Autofocus (AF) | YesNote. See below for further information | YesNote. See below for further information |
| Built-in Autofocus (AF) Motor |
No
Requires that the camera has an Autofocus Motor Compatible Cameras for Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
No
Requires that the camera has an Autofocus Motor Compatible Cameras for Sigma EX 20mm F1.8 DG ASP RF |
| Motor Type | N/A | N/A |
| Focus Method | No information | No information |
| Closest Focusing Distance | 27 cm | 20 cm |
| Maximum Magnification | ||
Aperture |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Maximum Aperture | F2,8 | F1,8 |
| Diaphragm Blades | No information | No information |
Optics |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Construction | 16 elements / 13 groups | 13 elements / 11 groups |
| Special Elements/Coatings | No information | No information |
Focal Length |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Focal Length | 17-50 mm | 20 mm |
| Zoom Range | 33 mm | None (Prime lens) No Zoom available. |
| Built-in Teleconverter | No | No |
| Teleconverter Multiplier | N/A | N/A |
| Image Stabilization | No | No |
| Image Stabilization CIPA Rating | N/A | N/A |
Physical |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Weather Sealing | No | No |
| Diameter | 73 mm | 88 mm |
| Length | 83 mm | 89 mm |
| Weight | 430 gr | 520 gr |
Other |
Tamron SP AF 17-50mm F2.8 XR Di-II LD Asph IF |
Sigma EX 20mm F1.8 DG ASP RF |
| Filter Type | Filter Thread | Filter Thread |
| Filter Diameter | 67 mm | 82 mm |
| Lens Hood | Included | Included |
| Lens Hood SKU | N/A | LH875-02 548 |
| Tripod Collar | N/A | N/A |
| Tripod Collar SKU | N/A | N/A |
| Other | Model A16 |
