Sigma 15mm F1.4 DG DN DIAGONAL FISHEYEvsTamron 12-20mm F2.8
15mm F1.4 DG DN DIAGONAL FISHEYE
15mm / F1.4
—
12-20mm F2.8
12-20mm / F2.8
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Which to choose
When the 15mm F1.4 DG DN DIAGONAL FISHEYE suits you better
- Brightness2.0 stops brighter — better in low light and blurs the background more
When the 12-20mm F2.8 suits you better
- Weight790g lighter, so easier to carry
- Close focusFocuses as close as 18cm
- Zoom rangeCovers 12-20mm in a single lens
These points are derived mechanically from the numbers. How a lens actually renders does not show up in specifications, so look at samples before deciding.
Size compared
- 15mm F1.4 DG DN DIAGONAL FISHEYE159.9mm long × 103.6mm diameter
- 12-20mm F2.8119.3mm long × 90mm diameter
Specifications compared
| Specification | Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Tamron 12-20mm F2.8 | Difference |
|---|---|---|---|
| Focal length (wide) | 15mm | 12mm | +3mm |
| Focal length (tele) | 15mm | 20mm | −5mm |
| Max aperture (wide) | F1.4 | F2.8 | 2.0 stops brighter |
| Max aperture (tele) | F1.4 | F2.8 | 2.0 stops brighter |
| Min aperture | F16 | F16 | — |
| Min focus distance | 39cm | 18cm | +0.21m |
| Max magnification | 0.06× | — | No data |
| Aperture blades | 11blades | — | No data |
| Weight | 1.36kg | 570g | +790g |
| Length | 159.9mm | 119.3mm | +40.6mm |
| Diameter | 103.6mm | 90mm | +13.6mm |
| Released | 2024 | 2025 | −1year |
| Stabilization | No | No | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as 15mm F1.4 DG DN DIAGONAL FISHEYE relative to 12-20mm F2.8.The highlighted cell is the better side for that specification.
Check prices
15mm F1.4 DG DN DIAGONAL FISHEYE
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12-20mm F2.8
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15mm F1.4 DG DN DIAGONAL FISHEYE in detail12-20mm F2.8 in detailAll E-mount lenses