---

title: Sigma 45mm f/2.8 DG DN Contemporary
description: "Ultra-lightweight 215g standard prime perfectly balanced for everyday mirrorless use. Compact f/2.8 lens embodies Contemporary line's optimal balance of size and high optical performance."
brand: Sigma
mount: L-Mount
focal_length: 45
aperture: 2.8
angle_of_view: 51
lens_type: Prime
weight: 215
year: 2019
weather_sealed: true
image_stabilization: false
price: 549
focus: Auto
lens_category: ["Normal"]
filter_size: 55
max_magn: 0.25
close_focus: 0.24
sku: N/A
diameter: 64
length: 46

date: 2025-07-23
draft: false
author: Jan Wedekind

featured_image: /lenses/sigma/sigma-45mm-f2-8.png

last_updates:
    - date: 2025-09-14
      note: "added reviews and key take-aways"


---

Key Take-Aways: 

The Sigma 45mm f/2.8 DG DN Contemporary is an ultra-light 215g standard prime, designed as an I-series style compact lens for everyday use on mirrorless cameras.
Professional reviews highlight its solid metal build, smooth rendering, good close-focus ability, and portability, while noting trade-offs such as modest sharpness wide open, visible vignetting, and a relatively high price compared to faster alternatives.
As of Sep 14 2025, user sentiment is mixed to positive: many enjoy its compact size, build quality, and pleasing character rendering, while others find it underwhelming optically relative to its cost.

From Sigma: 

> AN ENJOYABLE PRIME LENS YOUR CAMERA CAN HARDLY PART WITH ―ADMIRABLY BALANCED PERFORMANCE AND SIZE. FOR FULL-FRAME MIRRORLESS CAMERAS FROM OUR CONTEMPORARY LINE.
> 
> Embody the Contemporary line’s concept of “Pursuing optimum balance”. Achieve the best balance of a lens suited for everyday use.
> 
> 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.

[Official Website](https://www.sigma-global.com/en/lenses/c019_45_28_re/)

Reviews:

* Dustin Abbot: [Sigma 45mm F2.8 DG DN Review (Sony FE)](https://dustinabbott.net/2019/09/sigma-45mm-f2-8-dg-dn-review-sony-fe/), Sep 2019
* Photography Blog: [Sigma 45mm F2.8 DG DN Review](https://www.photographyblog.com/reviews/sigma_45mm_f2_8_dg_dn_fe_review), Mark Goldstein, Nov 2019
* The Phoblographer: [REVIEW: SIGMA 45MM F2.8 DG DN CONTEMPORARY (ALMOST A LEICA)](https://www.thephoblographer.com/2019/11/07/review-sigma-45mm-f2-8-dg-dn-contemporary-almost-a-leica/), Chris Gampat, Nov 2019
* DPReview: [Gear of the Year 2019 - Carey's choice: Sigma 45mm F2.8](https://www.dpreview.com/opinion/2810471127/gear-of-the-year-2019-carey-s-choice-sigma-45mm-f2-8), Carey Rose, Dec 2019
* lenstip.com: [LENS REVIEW: Sigma C 45 mm f/2.8 DG DN](https://www.lenstip.com/578.1-Lens_review-Sigma_C_45_mm_f_2.8_DG_DN.html), Maciej Latałło, Feb 2020

YouTube:

* Christopher Frost: [Sigma 45mm f/2.8 DG DN 'C' lens review with samples (Full-frame & APS-C)](https://www.youtube.com/watch?v=6ZS5pQmQdew), Nov 2019
* Three Blind Men and An Elephant: [Sigma 45mm f/2.8 DG DN Contemporary: Budget Jewel of the L-Mount Alliance](https://www.youtube.com/@3BMEP), Jan 2020
* Gordon Laing: [I LOVE 45mm! Sigma 45mm f2.8 DG DN review](https://www.youtube.com/watch?v=An7Fy0gcri0), May 2025