Viltrox AF 9mm f/2.8 Lens for Sony E

Viltrox AF 9mm f/2.8 Lens for Sony E (APS-C) Summary

The Viltrox AF 9mm f/2.8 Lens for Sony E is an ultra-wide angle prime lens for crop format (APS-C) Sony E-mount mirrorless cameras. With a compact build, 58mm front filter thread, and internal focusing design, it offers a strong balance of portability and performance for APS-C photographers and video creators.

The lens provides a 13.5mm equivalent focal length on Sony APS-C bodies, and is well suited to landscapes, interiors, architecture, and video production, where a wide field of view is especially useful.

Viltrox’s AF 9mm uses an advanced optical formula of 11 groups and 13 elements, which includes three ED glass elements, three high-refractive index elements, and two aspherical elements. This design helps suppress distortion and chromatic aberrations while maintaining clarity across the frame. Autofocus is driven by a quiet STM motor, and the lens features electronic aperture control for depth of field or exposure when shooting video. Internal focusing keeps the barrel length constant, which makes handling straightforward and helps balance when used with a gimbal.

The front element features both a nano multi-coating and a water-repellent layer to reduce flare, ghosting, and minimise the impact of dirt and smudges, while also making it easier to clean. With a 0.13m minimum focusing distance, the lens can capture close-up subjects with strong perspective, adding versatility for both stills and video content.

Viltrox AF 9/2.8 Lens for Sony E (APSC) Key Features

• 13.5mm equivalent field of view on APS-C Sony E cameras
• Optical design with 11 groups and 13 elements including 3 ED, 3 HR and 2 aspherical
• Fast f/2.8 aperture for low-light and depth of field control
• Silent STM autofocus motor with electronic aperture control
• Minimum focus distance of 0.13m for close-ups
• Nano multi-coating reduces flare and ghosting in strong light
• Water-repellent and anti-smudge coating on the front element
• Internal focusing maintains constant barrel length
• 58mm filter thread
• Dust and water resistant construction
• Firmware updates supported via a USB-C port

Viltrox AF 9mm f/2.8 Lens for Sony E (APS-C) in More Detail

Ultra-wide angle for APS-C

With a 9mm focal length, this lens provides a 13.5mm equivalent view on Sony APS-C cameras, which is extremely wide and suited to both stills and video. This makes it a good choice for landscapes, interiors, architecture, and travel photography, where you need to capture a broader perspective.

Optical design

The construction uses 11 groups and 13 elements, including three ED glass elements to reduce chromatic aberrations, three high-refractive index elements to help with distortion, and two aspherical elements that improve sharpness across the frame. The result is contrast-rich images with good colour fidelity, even when shooting at f/2.8.

Lens coatings

Viltrox applies a high-definition nano multi-coating to reduce flare and ghosting when shooting into the light. The front element also benefits from a water-repellent and anti-smudge layer, making the surface easier to clean and more reliable in everyday use.

Autofocus and handling

An STM motor drives autofocus, keeping it quiet for video and accurate for stills. The lens has electronic aperture control for smooth exposure transitions. Its internal focusing system ensures a constant barrel length, which is useful when attaching filters or using a gimbal.

Build quality

Lightweight and compact, the lens accepts standard 58mm screw-in filters and is built with a dust and water resistant design for outdoor work. Firmware updates are supported via a USB-C port located in the lens mount.

What’s in the box

• Viltrox AF 9mm f/2.8 Lens for Sony E (APS-C)
• Front and rear lens caps