Sigma Contemporary 45mm f/2.8 DG DN 45mm
A compact 215g full-frame prime with a fast internal focus system and weather sealing, this lens stands out for its versatile 45mm focal length and all-metal I Series build quality. Its f/2.8 aperture balances light gathering with a remarkably small footprint, making it a discreet everyday carry option. This lens is best for street and travel photographers who prioritize portability and tactile manual controls over maximum background separation.
Snapshot
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 28 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 45 |
| Focal Length Max | 45 |
| Elements | 8 |
| Groups | 7 |
| Coating | Super Multi-Layer Coating |
Aperture
| Max Aperture | f/2.8 |
| Min Aperture | f/2.8 |
| Constant | Yes |
| Diaphragm Blades | 7 |
Build
| Mount | Sony E |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.2 kg / 0.5 lbs |
| Filter Thread | 55 |
AF & Stabilization
| AF Type | stepping motor |
| Stabilization | No |
Focus
| Min Focus Distance | 240 |
| Max Magnification | 1:4 |
vs Competition
| Spec | Sigma Contemporary 45mm f/2.8 DG DN 45mm | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Sony E PZ 16-50mm f/3.5-5.6 OSS | Panasonic LUMIX S S-R28200 | OM System M.Zuiko Digital ED 12-100mm f/4 IS PRO |
|---|---|---|---|---|---|---|
| Focal Length | 45mm | 17-70mm | 17-28mm | 16-50mm | 28-200mm | 12-100mm |
| Max Aperture | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/4 | f/4 |
| Mount | Sony E | Sony E | Nikon Z | Sony E | L-Mount | Micro Four Thirds |
| Stabilization | false | true | false | true | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 215 | 544 | 450 | 107 | 413 | 561 |
| AF Type | stepping motor | RXD | Stepping Motor | Autofocus | Autofocus | Autofocus |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma Contemporary 45mm f/2.8 DG DN 45mm | 87.6 | 81 | 91.7 | 79 | 49.3 | 83.4 | 33.6 | 58.3 | 37 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.6 | 86.3 | 69.7 | 85.1 | 91.1 | 83.4 | 89.5 | 85.3 | 82.7 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.6 | 86.3 | 76 | 85.1 | 88.4 | 83.4 | 68 | 69.8 | 37 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.6 | 74.4 | 98.6 | 43.7 | 69.1 | 76.5 | 83.3 | 80.8 | 93.5 |
| Panasonic LUMIX S S-R28200 Compare | 53.6 | 77 | 78.3 | 74.2 | 92 | 65.3 | 95.4 | 75.7 | 99.5 |
| OM System M.Zuiko Digital ED 12-100mm f/4 IS PRO Compare | 53.6 | 63.7 | 68.6 | 57 | 96.9 | 65.3 | 96.6 | 62.8 | 96.9 |