Tilta Nucleus Auto Focus Adapter Launched – Adds Autofocus to Manual PL Lenses via Sony E-Mount

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by Nino LeitnerFebruary 6^th, 2026

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Tilta has officially launched the Nucleus Auto Focus Adapter (E to PL), a lens mount adapter that brings phase-detection autofocus to fully manual PL cinema lenses when paired with Sony E-mount cameras. The adapter works with Tilta’s Nucleus-M II and Nucleus Nano II wireless lens control systems, translating the camera’s native AF data into motor-driven focus movements. It is available for pre-order starting at $269, with shipping scheduled after April 7, 2026.

After first teasing the concept back in August 2025 and showing a working prototype at Inter BEE 2025, Tilta is now making the Nucleus Auto Focus Adapter officially available. The product addresses a real tension in professional filmmaking: cinematographers love the character and optical quality of vintage and high-end cinema lenses, but those lenses are entirely manual, which can make them impractical in run-and-gun, documentary, or small-crew scenarios where a dedicated focus puller is not available.

How the system works

Unlike LiDAR-based autofocus solutions that independently measure subject distance, the Nucleus Auto Focus Adapter taps directly into the camera’s own phase-detection autofocus system. The adapter reads AF data from the sensor of compatible Sony cameras, including the FX3, FX30, and FX6, and translates that information into precise motor commands sent to a Nucleus-M II or Nucleus Nano II motor via Tilta’s standard 7-pin cable connection.

Because the system relies on the camera’s native AF engine, it inherits all of the camera’s subject recognition capabilities. That means Sony’s face detection and eye tracking work with PL lenses that were never designed for autofocus. According to Tilta, this approach gives the adapter a key advantage over distance-measuring systems: it understands what is in the frame, not just how far away something is. The adapter is compatible with Sony’s Alpha and FX camera lines up to the FX6.

Lens library and calibration

One practical concern with any adapter-based AF system is calibration. Tilta has built a lens profile library directly into the adapter, pre-loaded with data for a range of common cinema lenses from manufacturers including ARRI, Cooke, and DZOFilm. For supported lenses, users simply select the appropriate profile from the on-screen menu and start shooting, with no additional calibration required.

For lenses not yet in the library, manual calibration is straightforward. Users enter just two data points, focal length and maximum aperture, and the adapter maps the lens mechanics accordingly. This process is handled entirely through the adapter’s own built-in display and controls, so no smartphone app or external software is needed. Custom lens profiles can be saved to the adapter’s internal storage and shared across connected Nucleus hand units, which is a useful workflow detail when swapping lenses frequently on set. Tilta has indicated that the lens library will expand through firmware updates.

Seamless AF/MF switching

One of the adapter’s most significant features for working professionals is its instant AF/MF override. When paired with the Nucleus-M II FIZ hand unit (our review here), a 1st AC can take manual control at any moment for precise focus pulls or creative racks, then release to hand control back to autofocus. This toggle approach preserves the traditional focus-pulling workflow while offering AF as a fallback or primary mode depending on the shot.

The system also supports iris control when two wireless motors are connected. In that configuration, the second motor drives the iris ring, and aperture adjustments can be made through the camera’s electronic control. According to Tilta’s demonstration video, the adapter works in photo mode as well, which opens up PL glass to hybrid shooters and photographers.

Compatibility and ecosystem

The Nucleus Auto Focus Adapter is designed specifically for Tilta’s existing wireless lens control ecosystem. It works with both the Nucleus-M II and the more affordable Nucleus Nano II (our review here) motor systems, which means users already invested in Tilta’s ecosystem can add autofocus capability without replacing their existing wireless control hardware. The adapter also includes a new rod support system that mounts directly without requiring a traditional baseplate.

This first version supports Sony E-mount to PL-mount only. Tilta has confirmed that Canon RF-mount and L-mount versions are planned for the future, though no specific timelines have been shared. It is worth noting that Viltrox has also entered this space with the NexusFocus F1 adapter, which launched on Kickstarter a few weeks ago at a considerably higher price point starting around $699 for early-bird kits.

Pricing and availability

The Tilta Nucleus Auto Focus Adapter is available in two kit configurations during the pre-order period, which includes a 10% discount. The Base Kit is priced at $269 (regular $299) and includes the adapter, a 15mm rod adapter, two aluminum rods (15 x 100mm), a 3mm Allen key, a Nucleus 7-pin to USB-C power cable, and an Advanced Side Focus Handle USB-C control cable for the Nano II Motor V2. The Dual Nano II Motor Kit is priced at $449 (regular $499) and adds two Nucleus Nano II motors, a USB-C power cable, and a Tilta F970 battery plate V2.

Pre-orders are open now with no deposit required; payment is not charged until the order ships. Shipping is scheduled to begin after April 7, 2026, and there is a limit of one unit per customer during this initial run.

Do you see an adapter like this fitting into your workflow with manual cinema glass? Could phase-detection AF finally make vintage and high-end PL lenses practical for small crews and solo operators? Let us know in the comments below!