Home News Sigma 45mm f/2.8 DG DN lens for L-Mount

Sigma 45mm f/2.8 DG DN lens for L-Mount


One of the most interesting lenses in today’s bumper Sigma announcement is a lightweight 45mm f/2.8 prime, a member of the Japanese manufacturer’s Contemporary lens line. It is tiny, for a full-frame lens, and weighs a remarkable 215g. It is available in the UK from this month and will retail for £550.

Sigma claim that this new compact offering will offer beautiful bokeh and rendering that can be enjoyed in every scene with high-speed and highly accurate autofocus.

This is a lens that I think many SL and Panasonic S1 owners will buy as a lightweight, versatile everyday optic.

I seems very likely that this lens has been designed specifically to complement the new full-frame “pocket camera”, the Sigma fp.

Press Release

SIGMA 45mm F2.8 DG DN

  • An enjoyable prime lens your camera can hardly part with
  • Admirably balanced performance and size for full-frame mirrorless cameras from our Contemporary line
  • Newly developed high-performance lens series for full-frame mirrorless cameras
  • Beautiful bokeh and rendering that can be enjoyed in every scene
  • High-speed and highly accurate AF enabled by the stepping motor
  • High build quality and outstanding operability

Launch: July, 2019

SRP: £549.99 (including VAT)

Lens Hood (LH577-01) supplied

Available AF mount: L-Mount, Sony E-mount

Note: The L-Mount Trademark is a registered Trademark of Leica Camera AG. Appearance and specifications are subject to change without notice.

Designed for combination with relatively small full-frame mirrorless cameras, this standard lens pursues easy operability as a regular prime lens by balancing its easy-to-carry size and high optical performance, thereby embodying the Contemporary line’s development concept of “pursuing optimum balance,” and becoming the perfect first lens in the lineup dedicated for full-frame mirrorless cameras.

About Product Name: Product name includes “DG” when the lens is designed to deliver the ultimate in performance on cameras with full-frame sensors, and “DN” when the lens design is optimized for mirrorless cameras with the short flange focal length.

With the SIGMA 45mm F2.8 DG DN | Contemporary, bokeh expressions are especially featured. Spherical aberration has been controlled to ensure not only the large bokeh in the front and rear of the subject but also the rear bokeh near the area in focus create a gradient to a soft blur. This lens softens the periphery of blurred images suppressing the double-line bokeh etc. and enhances the three-dimensional impression of the subject with the smooth expressions in the foreground and the background. In addition, its minimum focusing distance of 24cm makes it possible to enjoy shooting snapshots and tabletop photos taking advantage of the angle of view. The design gives consideration to vignetting to achieve beautiful round bokeh and subdue swirly bokeh in the whole bokeh effects.

While this lens produces smooth bokeh effects of which one could say as “classical expression” when the aperture is wide open, it also realizes modern sharp rendering when it is stopped down. It is reassuring to hold this lens as the regular lens for everyday use.

High-speed and highly accurate AF enabled by the stepping motor
The lens is capable of smooth, quiet and high-speed AF made possible by a stepping motor, as well as supports Face/Eye Detection AF and video AF. The design gives consideration to MF operations, and a ring of appropriate torque provides good operability.

High build quality and outstanding operability

Because this lens is intended for everyday use, particular attention has been given to build quality and operability. The bayonet hood feels comfortable when removing and attaching, and the lens barrel incorporating metal material as the main part achieves improved durability. Furthermore, thanks to the aperture ring with the right click feeling, comfortable operability during various shooting styles is ensured.

Other features

  • Mount with dust- and splash-proof structure
  • Full-time manual mode
  • Available Mount Conversion Service
  • Designed to minimize flare and ghosting
  • Evaluation with SIGMA’s own MTF measuring system: A1
  • 7-blade rounded diaphragm
  • High-precision, rugged brass bayonet mount
  • “Made in Japan” craftsmanship

For more information about the SIGMA GLOBAL VISION lineup of fine products, please visit the official SIGMA global website:

SIGMA GLOBAL VISION: https://www.sigma-global.com/en/lenses/


All figures calculated for L-Mount

Lens Construction: 8 elements in 7 groups|Angle of view (35mm): 51.3°|

Number of diaphragm blades: 7 (rounded diaphragm)|Minimum aperture: F22|

Minimum focusing distance: 24cm / 9.4in.|Maximum magnification ratio: 1:4|Filter size: φ55mm|Dimensions (diameter × length): φ64.0mm×46.2mm / φ2.5in. × 1.8in.|Weight: 215g / 7.5oz.

Barcode No.

For L-Mount: 0085126 360696 For Sony E-mount: 0085126 360658

Accessories Product Name / Barcode

Lens Hood LH577-01 (Supplied) /0085126 937270

FRONT CAP LCF III 55mm (Supplied) /0085126 930066

REAR CAP LCR II (Supplied)

For L-Mount: 0085126 937256  For Sony E-mount: 0085126 929879

SIGMA PROTECTOR 55mm (Optional) / 0085126 931049

SIGMA WR PROTECTOR 55mm (Optional) / 0085126 930912

SIGMA WR UV FILTER 55mm (Optional) / 0085126 930653

SIGMA WR CIRCULAR PL FILTER 55mm (Optional) / 0085126 930783

For further information, please contact your local authorized SIGMA Service Station listed in the link: http://www.sigma-global.com/en/about/world-network/

SIGMA GLOBAL VISION : http://www.sigma-global.com

Product information: https://www.sigma-global.com/en/lenses/cas/product/contemporary/c0194528/


  1. Mike – I think you are correct about it’s relation to the Sigma fp – but it will provide a great lightweight addition to the Lumix S1R!


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