Sigma 105mm F2.8 DG DN Macro Art vs Tamron 17-28mm F/2.8 Di III RXD
The bottom line
These cover different focal lengths — the Sigma 105mm F2.8 DG DN Macro Art is 105mm, the Tamron 17-28mm F/2.8 Di III RXD is 17-28mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 105mm F2.8 DG DN Macro Art for zoom, the Tamron 17-28mm F/2.8 Di III RXD for wide-angle.
Choose the Sigma 105mm F2.8 DG DN Macro Art if…
- ✓You need more reach — it goes to 105mm vs 28mm for distant subjects, wildlife and sport.
- ✓You shoot close-ups — 1x magnification gets you true macro the other can't.
- ✓You prefer a fast, compact single focal length — a 105mm prime over a zoom.
Choose the Tamron 17-28mm F/2.8 Di III RXD if…
- ✓You shoot wide — it starts at 17mm vs 105mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 17-28mm zoom covers what the fixed 105mm can't reframe.
- ✓You value portability — at 420g (14.8 oz) it's lighter than the 715g (1.58 lb) alternative for travel and all-day carry.
Where they differ
- ›Focal range: Sigma 105mm F2.8 DG DN Macro Art is 105mm, Tamron 17-28mm F/2.8 Di III RXD is 17-28mm — different framing and reach.
- ›Type: the Tamron 17-28mm F/2.8 Di III RXD is a zoom (flexible framing), the Sigma 105mm F2.8 DG DN Macro Art a prime (one focal length, usually brighter and lighter).
- ›Close-up: the Sigma 105mm F2.8 DG DN Macro Art reaches 1x magnification vs 0.19x — more for close-up and macro work.
- ›Weight: the Tamron 17-28mm F/2.8 Di III RXD is 420g (14.8 oz) vs 715g (1.58 lb) — you'll feel the difference handheld.
Frequently asked
Is the Sigma 105mm F2.8 DG DN Macro Art or the Tamron 17-28mm F/2.8 Di III RXD better?
These cover different focal lengths — the Sigma 105mm F2.8 DG DN Macro Art is 105mm, the Tamron 17-28mm F/2.8 Di III RXD is 17-28mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 105mm F2.8 DG DN Macro Art for zoom, the Tamron 17-28mm F/2.8 Di III RXD for wide-angle.
Who should choose the Sigma 105mm F2.8 DG DN Macro Art?
Choose the Sigma 105mm F2.8 DG DN Macro Art if you need more reach — it goes to 105mm vs 28mm for distant subjects, wildlife and sport. Choose it if you shoot close-ups — 1x magnification gets you true macro the other can't. Choose it if you prefer a fast, compact single focal length — a 105mm prime over a zoom.
Who should choose the Tamron 17-28mm F/2.8 Di III RXD?
Choose the Tamron 17-28mm F/2.8 Di III RXD if you shoot wide — it starts at 17mm vs 105mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 17-28mm zoom covers what the fixed 105mm can't reframe. Choose it if you value portability — at 420g (14.8 oz) it's lighter than the 715g (1.58 lb) alternative for travel and all-day carry.
What is the main difference between the Sigma 105mm F2.8 DG DN Macro Art and the Tamron 17-28mm F/2.8 Di III RXD?
Focal range: Sigma 105mm F2.8 DG DN Macro Art is 105mm, Tamron 17-28mm F/2.8 Di III RXD is 17-28mm — different framing and reach.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 105mm | 17-28mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 17 | 13 |
| Optical Groups | 13 | 12 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/2.8 |
| Minimum Aperture | f/22 | f/22 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 23° | 104° – 75° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | RXD |
| Focus Limiter | Yes | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 30 cm | 19 cm |
| Max Magnification | 1x | 0.19x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $799 | $799 |
| Filter Size | 62mm | 67mm |
| Diameter | 82.8mm | 73mm |
| Length | 142.3mm | 99mm |
| Weight | 715g (1.58 lb) | 420g (14.8 oz) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
