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Sigma 45mm F2.8 DG DN Contemporary Lens

The Sigma 45mm f/2.8 DG DN is a 45mm f/2.8 lens designed for L-Mount, Sony E mount cameras. Used copies start from $399.99 on GearFocus, with buyer protection on every purchase.

Sigma 45mm F2.8 DG DN Contemporary Lens

Sigma 45mm F2.8 DG DN Contemporary Lens

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Sigma 45mm f/2.8 DG DN Cont for L Mount O5 M5 C4 #99769

Condition: Excellent

Product Highlights

  • Compact prime lens for mirrorless cameras
  • Fast f/2.8 maximum aperture
  • High-quality optical performance
  • Lightweight and portable design

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Used Sigma 45mm f/2.8 DG DN Listings on GearFocus

Sigma 45mm f/2.8 DG DN Cont for L Mount O5 M5 C4 #99769
Sigma 45mm f/2.8 DG DN Cont for L Mount O5 M5 C4 #99769

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$399.99

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Lens Overview — Sigma 45mm f/2.8 DG DN

The Sigma 45mm f/2.8 DG DN Contemporary is a full-frame prime lens built for mirrorless camera systems, available in both L-Mount and Sony E mount configurations. Sitting in Sigma's Contemporary lineup, it strikes a practical balance between portability and optical performance. At just 215g, this is a lens you can keep mounted all day without fatigue — a genuine consideration for street photographers, travel shooters, and anyone who values a lighter kit without stepping down to a crop-sensor system.

The 45mm focal length sits in familiar standard-prime territory, offering a perspective that feels natural and versatile across a broad range of subjects, from candid portraiture to everyday scenes. The maximum aperture of f/2.8 provides a reasonable degree of background separation for a lens in this size and weight class. With a 55mm filter thread, adding polarizers or ND filters is straightforward and affordable.

The lens covers a full-frame image circle, so it's equally at home on both full-frame and any compatible APS-C mirrorless body without vignetting concerns. Autofocus is supported alongside manual focus control, giving shooters flexibility depending on the situation. With no image stabilization on board, users will need to rely on in-body stabilization if their camera supports it.

Key Features — Sigma 45mm f/2.8 DG DN

45mm Full-Frame Prime: A standard focal length that delivers a natural, versatile perspective well-suited to street, travel, and everyday photography on full-frame mirrorless bodies.

f/2.8 Maximum Aperture: Provides meaningful background separation and workable low-light performance while keeping the lens compact and lightweight.

215g Compact Build: Exceptionally light for a full-frame prime, making it practical for all-day handheld shooting without adding significant weight to a mirrorless kit.

L-Mount & Sony E Mount: Available in both mount options, covering major mirrorless ecosystems including Leica, Panasonic, Sigma, and Sony full-frame bodies.

Autofocus & Manual Focus: Supports both AF and MF operation, giving shooters the flexibility to switch between modes depending on the situation.

Full-Frame Image Circle: Covers the full 35mm frame with no vignetting, and is equally usable on APS-C mirrorless bodies in the same mount family.

Lens Specifications — Sigma 45mm f/2.8 DG DN

Sigma 45mm f/2.8 DG DN full specifications
SpecDetail
Use CasesTravel
Lens TypePrime
FormatFull Frame
Zoom/PrimePrime
Focal Length45mm
Maximum Aperturef/2.8
Camera SystemMirrorless
Lens MountL-Mount, Sony E
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Filter Thread55mm

Description — Sigma 45mm f/2.8 DG DN

The Sigma 45mm f/2.8 DG DN Contemporary is a prime lens designed specifically for mirrorless camera systems, available in L-Mount and Sony E mount variants. It covers a full-frame image circle and features a 45mm focal length — a natural, slightly wide standard perspective that works well across portraiture, travel, and everyday photography. The maximum aperture of f/2.8 allows for meaningful subject separation from the background while keeping the lens compact and lightweight at just 215g.

That weight makes a real difference during extended shoots or when building a travel-friendly kit. The 55mm filter thread is a practical, widely supported size, keeping the cost of accessories like ND and polarizing filters reasonable. Both autofocus and manual focus are supported, giving you control over how you engage with a scene.

There is no image stabilization built into the lens, so shooters who need stabilization should confirm their camera body provides it. As a full-frame lens on any compatible APS-C body, the image circle provides complete coverage with no vignetting.

Pros — Sigma 45mm f/2.8 DG DN

  • ✓Lightweight 215g body makes it highly portable for a full-frame prime lens
  • ✓Available in both L-Mount and Sony E mount, covering two major mirrorless ecosystems
  • ✓45mm focal length offers a versatile standard-prime perspective on full-frame

Cons — Sigma 45mm f/2.8 DG DN

  • ✗No image stabilization, so stabilization depends entirely on in-body systems
  • ✗f/2.8 maximum aperture is modest compared to faster 45mm or 50mm primes
  • ✗Prime design means no focal length flexibility — you zoom with your feet

Reviews — Sigma 45mm f/2.8 DG DN

Videos — Sigma 45mm f/2.8 DG DN

Sigma 45mm f/2.8 DG DN 'C' lens review with samples (Full-frame & APS-C) — Christopher Frost

Resources & Downloads — Sigma 45mm f/2.8 DG DN

Manuals & Guides

Frequently Asked Questions — Sigma 45mm f/2.8 DG DN

Which camera mounts is this lens compatible with?+
The Sigma 45mm f/2.8 DG DN Contemporary is available in L-Mount and Sony E mount versions. This covers a range of full-frame and APS-C mirrorless camera bodies across those two systems. Make sure to select the correct mount version for your camera.
Does this lens have image stabilization?+
No, the lens does not include image stabilization. If you need stabilization, you will need to rely on your camera body's in-body image stabilization system if it has one.
What sensor sizes does this lens support?+
The lens is designed for full-frame mirrorless cameras, as indicated by its full-frame lens format designation. It can also be used on APS-C bodies with compatible mounts without any vignetting at the full-frame image circle.
What filter size does this lens use?+
The Sigma 45mm f/2.8 DG DN Contemporary uses a 55mm filter thread, which is a common and widely available size for polarizers, ND filters, and other accessories.
How heavy is this lens?+
The lens weighs 215g, making it one of the more compact and lightweight options in the full-frame mirrorless prime category. This makes it well-suited for travel, street, or all-day shooting where minimizing kit weight is a priority.
Is this lens a zoom or a prime?+
This is a prime lens with a fixed 45mm focal length. There is no zoom capability, so framing requires physically moving relative to your subject. The fixed focal length is often associated with simpler optical designs and consistent maximum aperture.

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