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Sigma 45mm f/2.8 DG Contemporary Lens (L-Mount, Silver)

BH #SI4528SL • MFR #36S969
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Sigma 45mm f/2.8 DG Contemporary Lens (L-Mount, Silver)
Key Features
  • Full-Frame | f/2.8 to f/22
  • Compact, Versatile Wide-Normal Prime
  • Fast Internal Focus System
  • I Series Lens
Hugely versatile and impressively compact, the Sigma 45mm f/2.8 DG Contemporary Lens is a flexible prime offering a a useful field of view for everyday shooting. Slightly wider than the conventional 50mm, this 45mm suits a huge array of subjects, ranging from portraits to landscapes to close-up details.
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Sigma 45mm f/2.8 DG Contemporary Overview

Everyday Versatility
Hugely versatile and impressively compact, the Sigma 45mm f/2.8 DG Contemporary Lens is a flexible prime offering a a useful field of view for everyday shooting. Slightly wider than the conventional 50mm, this 45mm suits a huge array of subjects, ranging from portraits to landscapes to close-up details.

Complementing the unique field of view is a modest f/2.8 maximum aperture that is bright enough for working in available light conditions yet helps keep the overall lens size and weight down for everyday carry.
  • Contemporary Line lens features a compact design that measures approximately 2.5 x 1.8" and a weight of about 8 oz, making it portable enough for everyday shooting needs without compromising on optics or speed.
  • Internal focusing design pairs with a stepping AF motor for responsive and fast focusing performance that's suitable for both stills and video applications.
  • Optical design includes two aspherical elements, to optimize sharpness and limit aberrations, and a Super Multi-Layer Coating that controls flare and reflections.
  • Rounded 7-blade diaphragm contributes to a smooth and pleasing bokeh quality when employing selective focus techniques.
  • Dust and splash-resistant construction with a brass bayonet mount for ensured accuracy and durability.
Sigma I Series Lens
The Sigma I Series is a group of full-frame-compatible lenses emphasizing the ideal mixture of performance and compactness for mirrorless shooters. Combining high optical performance with a stylish and sleek design, these lenses are well-matched to contemporary mirrorless cameras and shooters who prioritize lenses with a high degree of usability, portability, and capability.
  • I series lenses have an all-metal construction, including precision-cut aluminum parts on the barrel that offers an elegant finish that's equally durable. Metal materials are also used throughout the internal construction for added robustness and reliability that is inspired by Sigma's Cine lens lineup.
  • Knurled aperture and focus rings, along with an included knurled metal lens hood, further contribute to a pleasing tactile experience.
  • In addition to knurled details, the lens features an intuitive AF/MF switch and the aperture ring includes an 'A' position for quick switching to an aperture-priority exposure mode.
  • I series lenses include both a conventional plastic lens cap along with a magnetic metal lens cap for more streamlined and minimal attachment method.
  • Magnetic lens cap is compatible with optional CH-11 Magnetic Cap Holder.
UPC: 198983941998

Sigma 45mm f/2.8 DG Contemporary Specs

Focal Length
45mm
Aperture
Maximum: f/2.8
Minimum: f/22
Lens Mount
L-Mount
Lens Format Coverage
Full-Frame
Angle of View
51.3°
Minimum Focus Distance
9.4" / 24 cm
Magnification
1:4 Macro Reproduction Ratio
0.25x Magnification
Optical Design
8 Elements in 7 Groups
Aperture/Iris Blades
7, Rounded
Focus Type
Autofocus
Image Stabilization
No
Filter Size
55 mm (Front)
Dimensions
ø: 2.52 x L: 1.82" / ø: 64 x L: 46.2 mm
Weight
7.8 oz / 220 g
Packaging Info
Package Weight
1.25 lb
Box Dimensions (LxWxH)
8.8 x 4.3 x 3.8"

Sigma 45mm f/2.8 DG Contemporary Reviews

Lightweight and robust

By Walter
Rated 5 out of 5
Date: 2026-05-14

I love this great little lens. It makes my Leica SL-3 a very practical travel camera. The quality of photos is excellent, however not as sharp as crisp when compared with original Leica L mount lenses.

Favorite lens on the s9

By Robert
Rated 5 out of 5
Date: 2025-07-15

I bought this to go along with the 28-200 and couldn’t be happier. The 45 hadn’t left my camera since it arrived. Images and video are excellent. I highly recommended it!

See any errors on this page?

how is this lens different from the same DG DN ...

how is this lens different from the same DG DN version?
Asked by: Khoa
I believe this lens now comes with the magnetic lens cap while the older model does not have the magnetic lens cap.
Answered by: Gary D
Date published: 2026-05-05
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