Sigma 45mm f/2.8 DG DN Contemporary Lens
In The Box
- 45mm f/2.8 DG DN Contemporary Lens
- Lens Hood
- Lens Cap
- Rear Cap
Sigma 45mm f/2.8 DG DN Contemporary Lens
The Sigma 45mm f/2.8 DG DN Contemporary is a compact, full-frame mirrorless prime lens available in Sony E-mount and Leica L-mount. As part of Sigma’s “Contemporary” / I-series, it emphasises a balance of optical performance, compact size and high build quality. With an 8-element/7-group optical design (including aspherical elements) it delivers sharp rendering when stopped down, and pleasing bokeh and subject separation.The lens features a metal mount, metal hood, an aperture ring with direct click stops (plus A position), and internal focusing driven by a stepping motor for smooth and quiet AF performance.
Its minimum focusing distance is 24 cm (≈9.4 in) achieving a maximum magnification of 1:4 (0.25×) which gives it a bit of close-focus flexibility beyond typical 45mm primes.
In reviews users particularly praise its “film-look” rendering, build quality (metal hood, metal barrel), compact size and excellent bokeh, although the modest maximum aperture of f/2.8 (vs f/1.8 or f/1.4 in other primes) is sometimes noted as a trade-off.
Key Features
- Full-frame compatible but mountable on APS-C (crop factor) cameras for E-mount.
- 45mm focal length — slightly wider than a “classic” 50mm, giving a more natural field for everyday and portrait use.
- Maximum aperture f/2.8, minimum f/22.
- Lens construction: 8 elements in 7 groups (with 2 aspherical lenses) for the full-frame version.
- 7-blade rounded diaphragm to help smooth bokeh.
- Minimum focusing distance: 0.24 m (24 cm) / 9.4 in.
- Maximum magnification: 0.25× (1:4) at minimum focus distance.
- Filter size: 55 mm.
- Dimensions: Diameter φ64.0 mm; Length (Sony E-mount) 48.2 mm.
- Weight: Sony E-mount version 230 g (≈8.1 oz).
- Includes lens hood (LH577-01) and caps (front and rear).
- Mount options: Sony E and Leica L.
- Weather-sealing at mount (dust & splash proof structure) and full-metal build for durability.
Best Suitable
- Photographers looking for a high-quality everyday prime that balances size, performance and affordability.
- Street, travel, documentary, lifestyle and “walk around” work because of the compact size and 45mm field.
- Portrait work where a standard focal length (45mm) gives a natural perspective without exaggeration.
- Users who value build quality (metal hood, metal barrel) and tactile controls (aperture ring) in a compact form.
- Mirrorless users (Sony E or Leica L mount) who want something more premium than kit zooms but less bulk than large f/1.4 primes.
FAQ – Sigma 45mm f/2.8 DG DN Contemporary Lens
Is f/2.8 “slow” for a prime lens?
Yes, compared to many standard primes (often f/1.8, f/1.4 or faster) a max aperture of f/2.8 is more modest. However, the trade-off here is a much smaller, lighter, more compact lens while still delivering very good optical quality. Reviewers found that stopped down to f/3.2 or f/4 the lens becomes very sharp.
Can this lens work on APS-C bodies?
Yes, for Sony E-mount APS-C bodies it will mount and cover the smaller sensor (giving ~67.5mm equivalent focal length).
Does it have image stabilisation (IS)?
No, the lens itself does not include optical stabilisation. On Sony cameras you would rely on in-body image stabilisation (IBIS) if available.
How is the autofocus speed and accuracy?
It uses a stepping motor enabling smooth and quiet AF operation. Tests found it accurate though AF speed was “OK” rather than lightning-fast in very low light.
Is it weather-sealed?
The mount is sealed and the build is robust with metal hood and barrel, though Sigma specifies “Mount with dust- and splash-proof structure”.
Should I buy it over a faster prime (e.g., f/1.8, f/1.4)?
It depends on your priorities. If you value compactness, build quality and everyday versatility, this Sigma 45mm f/2.8 is an excellent choice. If you need the absolute best low-light performance or very shallow depth of field, then a faster prime might be better—but will likely be larger, heavier and more expensive.
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Sigma 45mm f/2.8 DG DN Contemporary Lens
Specifications
| Sensor Format | Full-frame |
| Focal Length | 45 mm |
| Maximum Aperture | f/2.8 |
| Minimum Aperture | f/22 |
| Lens Construction | 8 elements in 7 groups |
| Angle of View (Full-frame) | 51.3° |
| Number of Diaphragm Blades | 7 (rounded) |
| Minimum Focusing Distance | 0.24 m / 9.4 in. |
| Maximum Magnification Ratio | 1:4 (0.25×) |
| Filter Size | φ55 mm |
| Dimensions (Ø × Length) | φ64.0 mm × 48.2 mm (Sony E) |
| Weight | 230 g / 8.1 oz (Sony E) |
Manufacturer & Address : Sigma Corporation 2-8-15 Kurigi, Asao-Ku, Kawasaki-shi, Kanagawa 215-0033 Japan.
Importer or Packer : Shetala Agencies Pvt. Ltd., 36, The Seshan Square, 5th Cross Street Kottivakkam, Chennai 600041.
Country of Origin : Japan.
GTIN No. :
Sony E : 0085126360658
Leica L – 0085126941987
