Sigma 28-45mm F1.8 DG DN | Art
Launch MSRP
$1,349- Weight
- 950g
- Filter
- ⌀82mm
- Min focus
- 0.30m
- Max mag.
- 0.25×
- Formula
- 18E / 15G
- Released
- 2024
Specification sheet
Optical construction
- 5x SLD
- 3x Aspherical
- Nano Porous Coating
- Super Multi-Layer Coating
- Water & Oil Repellent Coating
- Aperture range
- f/1.8 — f/16
Physical & ergonomics
- Weight
- 950g
- ⌀ × length
- 87.8 × 153.4mm
- Filter
- ⌀82mm
- Weather sealed
- Yes
- Aperture ring
- Yes · de-click
Autofocus actuator
- Stabilisation
- Body IBIS
- Teleconverter
- Not supported
- AF speed score
- 8.8 / 10
Close-up performance
- Min focus distance
- 0.30m
- Max magnification
- 0.25× (1:4.0)
Optical character
Sigma's 28-45 was the first full-frame zoom with a constant f/1.8 aperture. It replaces a 28mm, 35mm and 40mm prime set with one lens that keeps prime-like depth of field and low-light ability. The range is short on purpose: it is meant for documentary, wedding and video work where a fast standard view matters more than reach.
The zoom and focus are internal, so the 153mm length never changes, which suits gimbals. Optics include five SLD and three aspherical elements, focus breathing is kept low, and close focus is a constant 30cm (1:4 at 45mm). It has an HLA linear motor, a de-clickable aperture ring with a lock, two AFL buttons and a dust- and splash-resistant barrel.
Reviewer consensus
Reviewers found it as sharp as good primes at f/1.8 across the range, with only a slight drop in the extreme corners at 28mm, and very well corrected for colour fringing. Bokeh is smooth for a zoom, though not quite as soft as a dedicated f/1.4 prime.
The objections are size and weight: at 950g and over 15cm long it is much bigger than the primes it replaces, and the 28–45mm range is narrow. AF is fast and quiet for stills and video, and the internal zoom and low breathing make it a favourite for filmmaking.
Owner sentiment
Owners shooting events and video say it lets them work with one lens in dim venues, and many sold a set of primes after buying it. The constant length, aperture ring and smooth AF for video come up repeatedly.
The common complaints are the weight on long handheld days, the front-heavy balance on smaller bodies, and the short range, which some owners say forces them to pair it with a 70-200mm or an 85mm prime.
Strengths, weaknesses & performance
Strengths
- +Constant f/1.8 across 28–45mm
- +Prime-like sharpness wide open
- +Internal zoom and focus, constant length
- +De-clickable aperture ring, 2 AFL buttons
- +Low focus breathing for video
Weaknesses
- −Heavy at 950g, 153mm long
- −Short 28–45mm range
- −82mm filters and large hood
Six-axis rating
- Sharpness
- 9.2
- Bokeh Rendering
- 8.7
- Autofocus Speed
- 8.8
- Flare Resistance
- 8.5
- Build / Sealing
- 9.0
- Value / Size
- 8.4
Editorial 0–10 ratings synthesised from published reviews.
Technical specifications
| Mount | Sony E (FE) · full frame |
|---|---|
| Focal length | 28–45mm |
| Category | Standard |
| Maximum aperture | f/1.8 |
| Minimum aperture | f/16 |
| Construction | 18 elements in 15 groups |
| Special elements | 5x SLD · 3x Aspherical · Nano Porous Coating · Super Multi-Layer Coating · Water & Oil Repellent Coating |
| Aperture blades | 11 |
| Focus type | Autofocus |
|---|---|
| Drive | HLA Linear Motor |
| Minimum focus | 0.30m |
| Max magnification | 0.25× |
| Stabilisation | None (uses body IBIS) |
| Teleconverters | Not supported |
| Weight | 950g |
|---|---|
| Diameter × length | 87.8 × 153.4mm |
| Filter thread | ⌀82mm |
| Weather sealing | Yes |
| Aperture ring | Yes |
| De-clickable aperture | Yes |
| Release year | 2024 |
| Launch MSRP | $1,349 USD |
Sources
Specifications
- sigma-global.com/en/lenses/a024_28_45_18/
- sigmaphoto.com/28-45mm-f1-8-dg-dn-a
Similar focal length alternatives
- VS28-45mm F1.8 DG DN | Art vs 20-60mm F2.8-4 DG | Contemporary
- VS28-45mm F1.8 DG DN | Art vs FE 24-50mm F2.8 G
- VS28-45mm F1.8 DG DN | Art vs FE 20-70mm F4 G
- SigmaContemporary
20-60mm F2.8-4 DG | Contemporary
20–60mmF2.8–4- WT
- 375g
- FLT
- ⌀67mm
- MFD
- 0.16m
- MSRP
- $849
AFWR - SonyG
FE 24-50mm F2.8 G
24–50mmF2.8- WT
- 440g
- FLT
- ⌀67mm
- MFD
- 0.18m
- MSRP
- $1,100
AFWRRING·DC - SonyG
FE 20-70mm F4 G
20–70mmF4- WT
- 488g
- FLT
- ⌀72mm
- MFD
- 0.25m
- MSRP
- $1,100
AFWRRING·DC
