Sigma 28-105mm f/2.8 DG DN Art (L-mount) vs Sigma 28-45mm f/1.8 DG DN Art (L-mount)
The bottom line
Similar coverage, different speed: the Sigma 28-45mm f/1.8 DG DN Art (L-mount) opens to f/1.8 versus the Sigma 28-105mm f/2.8 DG DN Art (L-mount)'s f/2.8 — more light and shallower background blur. It comes down to how much you value that extra brightness.
Choose the Sigma 28-105mm f/2.8 DG DN Art (L-mount) if…
- ✓You need more reach — it goes to 105mm vs 45mm for distant subjects, wildlife and sport.
Choose the Sigma 28-45mm f/1.8 DG DN Art (L-mount) if…
- ✓You want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation.
Where they differ
- ›Aperture: the Sigma 28-45mm f/1.8 DG DN Art (L-mount) opens to f/1.8 vs the Sigma 28-105mm f/2.8 DG DN Art (L-mount)'s f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Sigma 28-105mm f/2.8 DG DN Art (L-mount) is 28-105mm, Sigma 28-45mm f/1.8 DG DN Art (L-mount) is 28-45mm — different framing and reach.
- ›Price: the Sigma 28-45mm f/1.8 DG DN Art (L-mount) is $1,099, $200 under the Sigma 28-105mm f/2.8 DG DN Art (L-mount).
Frequently asked
Is the Sigma 28-105mm f/2.8 DG DN Art (L-mount) or the Sigma 28-45mm f/1.8 DG DN Art (L-mount) better?
Similar coverage, different speed: the Sigma 28-45mm f/1.8 DG DN Art (L-mount) opens to f/1.8 versus the Sigma 28-105mm f/2.8 DG DN Art (L-mount)'s f/2.8 — more light and shallower background blur. It comes down to how much you value that extra brightness.
Who should choose the Sigma 28-105mm f/2.8 DG DN Art (L-mount)?
Choose the Sigma 28-105mm f/2.8 DG DN Art (L-mount) if you need more reach — it goes to 105mm vs 45mm for distant subjects, wildlife and sport.
Who should choose the Sigma 28-45mm f/1.8 DG DN Art (L-mount)?
Choose the Sigma 28-45mm f/1.8 DG DN Art (L-mount) if you want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation.
What is the main difference between the Sigma 28-105mm f/2.8 DG DN Art (L-mount) and the Sigma 28-45mm f/1.8 DG DN Art (L-mount)?
Aperture: the Sigma 28-45mm f/1.8 DG DN Art (L-mount) opens to f/1.8 vs the Sigma 28-105mm f/2.8 DG DN Art (L-mount)'s f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 28-105mm | 28-45mm |
| Lens Type | Zoom | Zoom |
| Optical Elements | 18 | 18 |
| Optical Groups | 13 | 15 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/1.8 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | L-Mount | L-Mount |
| Angle of View | 75° – 23° | 75° – 51° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | HLA |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 37 cm | 20 cm |
| Max Magnification | 0.2x | 0.26x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | Yes |
| Declickable Aperture | Yes | Yes |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $1,299 | $1,099 |
| Filter Size | 82mm | 82mm |
| Diameter | 92mm | 92mm |
| Length | 149.2mm | 149.2mm |
| Weight | 1055g (2.33 lb) | 1020g (2.25 lb) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
