Viltrox AF 9mm F2.8 Air APS-C Ultra-Wide Lens for Sony E-Mount

The Viltrox AF 9mm F2.8 Air is a compact, ultra-wide APS-C prime lens designed for Sony E-Mount creators who want maximum field of view in a lightweight travel-friendly package. With a sweeping 113.8° angle of view and a 13.5mm full-frame equivalent focal length, it captures expansive landscapes, dramatic architecture, tight interiors, and immersive POV vlogs with ease. The bright F2.8 aperture ensures clean, detailed images in low-light environments while providing creative depth-of-field control for dynamic ultra-wide compositions.

Engineered for portability at just ~175g, the lens features advanced optical construction with 13 elements in 11 groups, including 2 aspherical, 3 extra-low-dispersion, and 3 high-refractive index lenses for outstanding clarity, minimal distortion, and rich color accuracy. The STM autofocus motor provides fast, smooth, and quiet focusing with reliable eye and face detection—ideal for both still photography and video shooting. A sealed body, durable metal mount, 58mm front filter thread, and USB-C firmware upgrade port make this lens a practical, high-performance choice for travel, vlogging, and everyday creative work.

Key Features

• Ultra-wide 113.8° view (≈13.5mm full-frame equivalent)

• Lightweight pocket-size design — ~175g

• Bright F2.8 aperture for low-light scenes

• Advanced 13/11 optical formula: 2 Aspherical, 3 ED, 3 HR

• Excellent distortion control for natural ultra-wide rendering

• Fast, accurate STM autofocus with eye & face detection

• Minimal focus breathing for smooth video transitions

• 0.13m minimum focusing distance for unique close-up perspectives

• Sealed body construction with durable metal mount

• 58mm filter compatibility

• Front element with anti-fouling & water-resistant coating

• USB-C port for firmware updates

Specifications

Optical & Focusing

• Focal Length: 9mm

• Full-Frame Equivalent: 13.5mm

• Lens Construction: 13 elements in 11 groups

• Viewing Angle: 113.8°

• Aperture Range: F2.8–F16

• Aperture Blades: 7

• Minimum Focusing Distance: 0.13 m

• Maximum Magnification: 0.15×

• Focus Mechanism: Internal focus

• Focus Motor: STM + Lead screw

• Focus Modes: AF / MF

Physical

• Filter Size: 58mm

• Lens Size: Φ65 × 56.4 mm

• Weight: Approx. 175g (bare lens)

• Body: Sealed design

• Mount: Metal

• Firmware Update: USB-C