12-20mm F2.8

The defining feature of the 12-20mm F2.8 (Model A084) for full-frame mirrorless cameras is its ultra-wide focal range, starting at a remarkable 12mm. While 14mm or 16mm lenses are wide, the expansive 12mm perspective provides an unparalleled sense of scale. It allows you to emphasize perspective and capture the world with dynamic intensity — ideal for everything from majestic architecture to vast, sweeping landscapes.
Furthermore, the 12-20mm F2.8 maintains a bright F2.8 maximum aperture throughout the entire zoom range. Whether you are shooting star-filled night skies or dimly lit interiors, this lens excels in every environment.

■ Advanced Coating Technologies
● AX (Anti-reflection eXpand) Coating: The 12-20mm F2.8 features AX Coating that achieves a uniform film thickness via vapor deposition across the entire surface of highly curved convex elements. This technology effectively suppresses harmful light, ensuring exceptionally clear and crisp image.

● BBAR-G2 (Broad-Band Anti-Reflection Generation 2) Coating: The 2nd-generation BBAR-G2 Coating significantly minimizes ghosting and flare, even in challenging backlit conditions. This results in high-contrast, vivid rendering with remarkable pop.

The 12-20mm F2.8 achieves a sophisticated balance between uncompromising image quality and exceptional mobility. Through countless iterations of both optical and mechanical redesign, we have achieved a remarkably compact form factor — measuring just 119.3mm (4.7in) in length and weighing only 570g (20.2oz).¹
By fine-tuning individual components at the micron level and conducting exhaustive durability testing, we have ensured that this 12-20mm F2.8 meets the highest standards of strength and reliability. Whether you are trekking up a mountain or setting up for a night under the stars, this lens significantly lightens your load without sacrificing performance.

1 Length and weight are for Sony E-mount.

①Custom Switch / ③Focus Set Button / ⑥Connector Port (USB Type-C):
Used in conjunction with the TAMRON Lens Utility^TM application. These allow you to customize lens functions and assign practical features for both video and still photography, supporting a more versatile shooting experience.

②AF/MF Switch:
AF/MF Switch allows for instantaneous switching between autofocus and manual focus. This intuitive control ensures your shooting rhythm remains uninterrupted.

④MF Lock Switch:
MF Lock Switch disables the focus ring to prevent accidental focus shifts. This is especially critical during long-exposure tasks like astrophotography, where maintaining a precise focus point is vital.

⑤Zoom Lock Switch:
Zoom Lock Switch locks the zoom at either the 12mm wide end or 20mm longer end. This stabilizes your intended composition at these frequently used focal lengths, preventing unintended movement during a shoot. The lock can be quickly disengaged by simply rotating the zoom ring, allowing for a seamless transition to your next shot.

⑦Click ON/OFF Switch:
Click ON/OFF Switch toggles the clicking sound and feel of the aperture/control ring, allowing you to match your operating style to stills or video.
• ON: Provides tactile feedback for each increment, making it easier to select specific settings and enhancing operability for still photography.
• OFF: Enables smooth, silent ring rotation for natural-looking exposure and bokeh transitions during video recording.

⑧Iris Lock Switch (Sony E-mount only):
This Iris Lock Switch locks the aperture ring at the "A" position on the aperture scale, or within the manual range between "F2.8 - F16." This allows you to choose whether to control the aperture via the camera body or the lens ring.
• Locked at "A" (Auto): The aperture is controlled via the camera body.
• Locked within the manual range (F2.8 - F16): The aperture is controlled via the lens ring.

Control Lock Switch (Nikon Z mount only):
Control Lock Switch determines whether settings such as aperture or exposure compensation are adjusted via the camera or the lens ring.
• Camera-side control: Set the switch to ON.
• Lens-side control: Set the switch to OFF.

⑨Aperture Ring (Sony E-mount only):
Aperture ring provides intuitive, tactile control over aperture settings, allowing the photographer's intent to be reflected instantly.

Control Ring (Nikon Z mount only):
Control Ring allows for the custom assignment of functions such as aperture or exposure compensation, ensuring smooth, integrated operation with the camera body.

The 12-20mm F2.8 comes with a wrapping cloth to help protect the lens in your bag. The fabric features a self-gripping surface that adheres to itself, allowing you to fold it neatly around the lens to protect it from surface dust and scratches. It is compact and folds down easily when not in use, making it a convenient accessory for transport.

* Please be sure to read the instruction manual before use.

For Sony E-mount Includes:
- Fast Hybrid AF
    An autofocus system that combines the traditional Contrast Detection AF with Phase Detection AF.
- Eye AF
    A feature that allows the camera to automatically focus on the eyes of a subject.
- Direct Manual Focus (DMF)
    A feature on Sony cameras that allows you to adjust focus after the camera's autofocus system has locked onto a subject.
- In-camera Lens Correction (Shading, Chromatic Aberration, Distortion)
- AF Assist
    A feature that combines autofocus and manual focus to help you focus on your subject. It's especially useful for videographers.

For Nikon Z mount includes:
- Hybrid AF
- Eye AF
- M/A Mode
    Autofocus with a manual override. You can manually change focus without having to change to manual.
- In-camera Lens Correction (Shading, Chromatic Aberration, Distortion)

* Features vary by camera. Please consult your camera’s instruction manual for details.
* If your camera has a lens correction setting (e.g., "Lens Compensation" or similar), please ensure it is set to "ON" or "AUTO."
* Please update the firmware to the latest version.
* As of June 2026