Tamron 12–20mm F2.8 Di III-A RXD (Model A084) – for Sony E (FE) Full-Frame Mirrorless Cameras

Ultra-wide, fast-aperture zoom designed for Sony E-mount creators

The Tamron 12–20mm F2.8 Di III-A (Model A084) is a professional ultra-wide-angle zoom lens designed for Sony E-mount full-frame mirrorless cameras. It delivers an exceptionally wide focal range, a constant F2.8 aperture, and a compact, lightweight build tailored for landscape, architecture, and astrophotography.

Extreme ultra-wide 12–20mm focal range

Built to capture expansive scenes with dramatic perspective:

• 12mm ultra-wide for immersive, ultra-wide compositions

• 20mm for slightly tighter framing while retaining wide-angle impact

• Ideal for landscapes, interiors, architecture, and night sky photography

• Constant F2.8 aperture throughout the zoom range

Bright F2.8 aperture for low-light performance

The constant F2.8 aperture ensures strong performance in all lighting conditions:

• Excellent astrophotography capability

• Strong low-light performance for interiors and twilight scenes

• Controlled depth of field for creative foreground separation

• Consistent exposure when zooming for photo and video

Optical design optimised for edge-to-edge sharpness

Engineered for high-resolution Sony full-frame sensors:

• Advanced aspherical and special low-dispersion elements

• Reduced chromatic aberration and distortion

• Suppression of sagittal coma flare for night sky clarity

• High sharpness from centre to extreme edges

Compact, lightweight professional build

Despite its extreme wide-angle performance, the lens remains highly portable:

• Approx. 119mm class length (mount dependent)

• Around 570g weight

• Balanced for handheld and gimbal use

• Moisture-resistant construction for outdoor reliability

Fast, precise autofocus system

Designed for modern Sony hybrid creators:

• VXD linear motor autofocus for speed and accuracy

• Quiet focusing ideal for video recording

• Smooth subject tracking performance

• Reliable operation for stills and cinema workflows

Close focusing for creative wide-angle work

Strong minimum focus distance enhances versatility:

• Minimum focus distance as close as 0.18m (12mm end)

• Allows dramatic foreground emphasis

• Excellent for interior detail and creative compositions

• Expands ultra-wide storytelling capability

Key features

• Tamron-designed lens (not Sony-branded)

• For Sony E-mount full-frame mirrorless cameras

• 12–20mm ultra-wide zoom range

• Constant F2.8 aperture

• VXD high-speed autofocus system

• Astrophotography-optimised optical design

• Compact and lightweight build

• Moisture-resistant construction

Summary

The Tamron 12–20mm F2.8 Di III-A RXD for Sony E is a high-performance ultra-wide zoom lens designed for creators who need maximum field of view with professional image quality. With its constant F2.8 aperture, excellent edge-to-edge sharpness, and compact design, it is a powerful tool for landscapes, architecture, and astrophotography on Sony E-mount full-frame mirrorless systems.