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 | ||
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 |