---
title: "Sirui Swift 20mm f/2.4"
description: "Compact ultra-wide autofocus prime with an STM motor, clicked aperture ring, AF/MF switch and FN button. Weather-sealed, 0.2 m close focus, 58 mm filter thread. Sirui pitches it as a lightweight daily-carry lens for travel, street and vlogs."
brand: "Sirui"
mount: L-Mount
focal_length: 20
aperture: 2.4
angle_of_view: 92
lens_type: "Prime"
lens_category: ["Ultra-Wide Angle"]
weight: 212
year: 2026
weather_sealed: true
image_stabilization: false
price: 149
focus: "Auto"
filter_size: 58
max_magn: 0.136
close_focus: 0.2
sku: "SW20-L"
diameter: 69.5
length: 60
date: 2026-10-31
draft: false
author: "Jan Wedekind"
featured_image: /lenses/sirui/sirui-swift-20mm-f2-4.png
---

Key Take-Aways:

The Sirui Swift 20mm f/2.4 is a compact ultra-wide autofocus prime with an STM motor, a clicked aperture ring, an AF/MF switch and a customisable function button, which Sirui pitches as a lightweight everyday lens for travel, street and vlogging.

From Sirui:

> Light weight, Auto focus, Uncompromising Image Quality. High-Value Entry Grade Full Frame Lens. Effortless Creation by Daily Carry Lens.
>
> The ultra-wide 20mm Swift lens provides an expansive perspective. Perfect for landscapes, street snaps, and vlogs, it is your lightweight everyday companion for effortless creation.
>
> An STM motor delivers quick, smooth autofocus, helping you keep moving subjects in focus and capture fleeting moments.
>
> Low distortion, natural color rendering, and minimal focus breathing help create a consistent look as focus shifts. Ideal for vlogs, short films, and time-lapse photography.
>
> Featuring a clicked aperture ring, the lens allows precise aperture adjustments with clear, tactile clicks for intuitive control.
>
> Compact, palm-sized, and built to travel. From streets to sights, grab it and capture the moment your way.

[Official Website](https://store.sirui.com/products/sirui-swift-series-20mm-f2-4-40mm-f2-2-full-frame-autofocus-lens?variant=67809436762338)

Reviews:

* (No reviews available when the lens was added.)

YouTube:

* (No reviews available when the lens was added.)