Viltrox NexusFocus F1: The First PL-E Autofocus Adapter for Sony
May 7, 2026
Brief summary: The Viltrox NexusFocus F1 is the first PL-E autofocus adapter for Sony E-mount cameras, transforming manual focus cine lenses into autofocus ones. The system utilizes Sony's built-in PDAF and includes motors for focus, aperture, and zoom. The official price is $599, and calibration is completed via a mobile app in 10-15 minutes per lens.
The Chinese company Viltrox has unveiled a device many thought impossible. The NexusFocus F1 transforms professional PL-mount cine lenses into fully functional autofocus systems on Sony E-mount cameras.
This isn't just another mechanical adapter. It's the world's first adapter that utilizes Sony cameras' native phase detection autofocus for manual focus.
How does the NexusFocus F1 autofocus technology work?
Unlike LiDAR-based solutions, which measure the distance to an object independently of the camera, the Viltrox Nexus Focus F1 PL-E integrates directly with Sony's PDAF (Phase Detection Autofocus) system. According to Newsshooter, the adapter acts as a "translator" between the camera and lens.
The camera analyzes the scene through its phase-detection autofocus sensors. The adapter receives this data and converts it into commands for the motors that control the lens's focus ring.
The result? Autofocus accuracy on par with native Sony optics. Face, eye, and animal detection are supported—all AI autofocus features are available with vintage cinema lenses.
Advantages of PDAF over LiDAR
LiDAR solutions measure physical distance but don't take into account frame composition. PDAF analyzes exactly what the camera's sensor sees.
This means parallax-free accuracy. What the camera focuses on in the viewfinder is the actual focal point on the lens, without any discrepancies or adjustments.
System Package and Specifications
According to the official Viltrox website, the basic Single Motor Package includes the PL-E adapter itself and one focus motor. The price is $599.
On Kickstarter, the dual-motor version was priced at $1099. The system supports three-channel FIZ (Focus, Iris, Zoom) control using three motors simultaneously.
The adapter is compact and lightweight. The mount is reinforced with precision contacts and dust-proof—an essential feature for on-set use.
Motor System and Power
The motors are connected to the adapter via standard cables. Power is supplied via USB-C, simplifying connection to external batteries or power sources on the rig.
The display on the adapter body shows the current focus, aperture, and zoom settings. Control is also available via a wireless app (currently only available for iOS; Android support is planned).
Lens Calibration via App
This is where the fun begins. Every lens requires calibration before first use. The process is fully automated via the mobile app.
According to CineD, lens calibration without a pre-profile takes approximately 10-15 minutes. Zoom lenses require longer. According to Newsshooter's tests with the Angenieux 30-76mm T2.8 zoom, calibration took approximately 10 minutes due to the need to check all focal lengths.
The app creates a lens profile, storing data on the focusing range, response curve, and mechanical characteristics. Profiles are stored in the adapter's memory and are automatically loaded when the lens is reconnected.
Step-by-Step Calibration Process
Launch the app on your smartphone. Attach the lens to the adapter. Click "Start Calibration."
The system automatically rotates the focus ring from minimum to maximum distance, collecting data. For zoom lenses, the process is repeated at each focal length.
Once completed, the profile is saved. The next time you use this lens, calibration is not required—the adapter recognizes the lens and loads the settings.
Hands-on Tests and Real-World Performance
Digital Camera World tested the NexusFocus F1 on a Sony A7R IV with several cinema lenses. The results exceeded expectations.
Autofocus is fast and accurate in good lighting. Eye detection works as reliably as with native Sony G Master lenses. The system does not lose focus during sudden camera movements.
Performance drops in low light, but this is a limitation of the camera itself and the PDAF technology, not the adapter.
Who is this system for?
Solo videographers gain a huge advantage. They no longer need a second person to control focus when filming interviews or documentaries.
Owners of vintage cinema lenses can use classic optics with modern conveniences. This is especially relevant for small commercial shoots and creative projects.
Small and medium-sized teams save time and resources. According to Keith Knittel, the adapter is especially useful for TVC shoots with a limited budget.
Technical Limitations and Nuances
The system only works with Sony E-mount cameras. According to Digital Camera World, Viltrox plans to expand its reach to other cameras, but no specific dates or models have been announced.
Calibrating zoom lenses is time-consuming. If you're working with a large range of lenses, you'll need to set aside several hours for preparation.
CineD notes that the included motors are functional, but leave room for improvement in future versions. They're adequate, but don't measure up to premium FIZ systems.
Availability in Ukraine and Price
According to the official Viltrox website, the basic Single Motor Package costs $599. On Kickstarter, the dual-motor version was priced at $1099.
At the time of publication (March 2026), the adapter is available through the official Viltrox website and was successfully funded on Kickstarter.
For context: this is more expensive than most simple mechanical adapters, but significantly cheaper than professional wireless FIZ systems, which cost thousands of dollars.
Alternatives and Competitors
There are LiDAR solutions for autofocusing manual lenses on the market. However, they operate independently of the camera and do not use native PDAF.
Mechanical PL-E adapters from other manufacturers are cheaper but require manual focus or separate follow focus systems.
The NexusFocus F1 occupies a unique niche as the first adapter to integrate with Sony autofocus at the hardware level.
Conclusion
The Viltrox NexusFocus F1 is a significant step forward for owners of manual focus cine lenses. The system truly works, transforming vintage and professional PL optics into autofocus lenses for Sony cameras.
The price of $599 may seem high, but for that price, you get technology that saves time on set and opens up new possibilities for solo work.
If you have PL lenses and a Sony E-mount camera in your kitbag, the NexusFocus F1 is worth considering. Ukrainian buyers are advised to keep an eye out for the adapter's availability from authorized distributors.
Frequently Asked Questions
Does the NexusFocus F1 work with cameras from other manufacturers?
Currently, the adapter only supports Sony E-mount cameras. According to Digital Camera World, Viltrox is planning to expand support for other cameras, but no specific dates or models have been announced yet. The system requires hardware integration with the camera's PDAF, which complicates adaptation to other mounts.
How long does lens calibration take?
According to CineD, lens calibration without a pre-profile takes approximately 10-15 minutes. According to Newsshooter's tests with the Angenieux 30-76mm T2.8, the process took about 10 minutes due to the need to check all focal lengths. Calibration is a one-time process, and the profile is saved in the adapter's memory.
Can the adapter be used without motors?
Technically, the adapter can be used without motors, like a regular mechanical PL-E adapter. However, autofocus only works when a focus motor is connected. Full FIZ control requires three motors: focus, aperture, and zoom. The standard package includes one focus motor.
Is lens data written to EXIF metadata in photos?
Yes, the NexusFocus F1 writes lens information to EXIF metadata for both photos and videos. The system stores focal length, aperture, and other parameters, which is convenient for cataloging and post-processing. This is a rare feature for manual lens adapters.
Does Sony face and eye detection work?
Yes, all Sony AI autofocus functions are fully supported. Face and eye detection for humans and animals, as well as object tracking, work with PL lenses via the NexusFocus F1. According to Digital Camera World tests, Eye-AF works as reliably as with genuine Sony lenses.
What is the warranty on the adapter and motors?
Official warranty information is available on the Viltrox website and from authorized distributors. The manufacturer typically provides a 12-month warranty on its products, but it is recommended to confirm the exact terms for your specific region with the seller upon purchase.
Do the motors require additional power?
The system is powered via the USB-C port on the adapter. The motors are powered by the adapter itself, which can be connected to an external battery, power bank, or the rig's power source. Separate batteries for the motors are not required, simplifying configuration and reducing the overall weight of the system.