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Sigma 45mm f/2.8 DG DN C (Contemporary) Full-Frame Autofocus Lens for Leica L-Mount, Black {55}
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$380.00
Sigma 45mm f/2.8 DG DN Contemporary: the full-frame mirrorless standard prime.
At 215 grams and just 46.2mm long, this lens disappears into a bag and barely registers on a mirrorless body. That compact footprint is the point. Sigma built the 45mm f/2.8 DG DN Contemporary specifically for full-frame mirrorless systems, and the proportions show it, a 55mm filter thread, 64mm maximum diameter, and a profile short enough to pair naturally with compact bodies like the Leica SL2-S or Panasonic S5 without front-heaviness.
The 8-element, 7-group optical formula keeps things tight without cutting corners. A stepper motor drives internal autofocus quietly and accurately, making the lens workable for video alongside stills. Full-time manual override lets you pull focus without switching modes. The aperture ring gives direct, tactile control over exposure, which street and documentary shooters will appreciate immediately. Weather sealing rounds out a build that handles real shooting conditions without special handling.
At 45mm and f/2.8, with a minimum focus distance of 24cm and a 1:4 reproduction ratio, the lens sits in genuinely useful territory. It is wide enough for environmental work, long enough to compress a face naturally, and close-focusing enough to handle small subjects with 0.25x magnification. For L-Mount shooters who want one lens that earns daily use without the bulk of a larger prime, this one has a well-established track record.
Who It's For
Travel photographers working the L-Mount system get a lens that weighs less than most wallets full of gear while covering the most-used focal range in everyday shooting. Street photographers benefit from the aperture ring for quick exposure adjustments and weather sealing for unpredictable conditions. Documentary and video shooters will use the quiet stepper motor AF and full-time manual focus to move between run-and-gun and deliberate focus pulls. Portrait photographers shooting environmental work find the 45mm angle of view and f/2.8 aperture enough to separate a subject from a busy background without going full telephoto.
Key Features
- 8-element, 7-group optical design with stepper motor autofocus
- f/2.8 to f/22 aperture range with manual aperture ring control
- Full-time manual focus override for video and manual cinematography
- 24cm minimum focus distance with 1:4 macro reproduction ratio
- 215g body with weather sealing for field reliability
- 55mm filter thread pairs naturally with Sigma 24mm and 90mm f/2.8 primes
- Internal focusing mechanism with quiet autofocus motor
FAQ
- What's the actual size and weight of this lens?
- 215 grams and 46.2mm long with a 64mm maximum diameter. It's built for full-frame mirrorless bodies without adding bulk or front-heaviness to compact cameras like the Leica SL2-S.
- Is autofocus silent enough for video work?
- Yes. The stepper motor is quiet and accurate, making it usable for both stills and video. Full-time manual override lets you pull focus without switching modes.
- How close can you focus, and does it do macro work?
- Minimum focus distance is 24cm with 0.25x magnification (1:4 ratio). It handles small subjects and close detail work, but it's not a dedicated macro lens.
- Does this lens have optical image stabilization?
- No stabilization. At 45mm and f/2.8, you'll need steady technique or a faster shutter speed in lower light.
- What's the aperture range, and can you control it manually?
- f/2.8 to f/22 with a physical aperture ring for direct exposure control. No electronic aperture stepping, which is useful for manual cinematography work.
- Is the lens weather sealed?
- Yes. It handles real shooting conditions without requiring special care, though it's not submersible.
- Why 45mm instead of a more standard 50mm focal length?
- 45mm sits between wide environmental coverage and telephoto compression. It's close-focusing at 24cm, giving you genuinely useful working distance for documentary, street, and portrait work without needing a dedicated macro lens.
| Specification | Value |
|---|---|
| Focal Length | 45mm |
| Max Aperture | f/2.8 |
| Min Aperture | f/22 |
| Mount | Leica L |
| Stabilization | No |
| AF System | Yes |
| Min Focus Distance | 9.45" / 24 cm |
| Lens Type | Prime |
| Lens Format | Full Frame |
| Angle Of View | 51.3 degrees |
| Elements | 8 |
| Groups | 7 |
| Diaphragm Blades | 7 |
| Reproduction Ratio | 1:4 |
| Maximum Magnification | 0.25x |
| Filter Thread | 55mm |
| Motor Type | Stepper motor |
| Full Time Manual | Yes |
| Focus Method | Internal |
| Aperture Ring | Yes |
| Distance Scale | No |
| DOF Scale | No |
| Weather Sealing | Yes |
| Length | 1.82" / 46.2 mm |
| Maximum Diameter | 2.52" / 64.0 mm |
| Weight | 7.58 oz / 215 g |
This description was generated using AI based on KEH's internal product standards, product expertise, and knowing what customers care about most. While we strive for accuracy, details may vary by individual item.
| Brand Name | Sigma |
|---|---|
| Filter Size | 55mm |
| Focus Type | Autofocus (lens motor) |
| Lens Mount | Leica L-Mount |
| Lens Type | Standard / Normal |
| Max Focal Length | 45mm |
| Min Focal Length | 45mm |
