Viltrox EF-FX1 PRO Auto Focus Adapter + Control Ring for Canon EF/EF-S Lenses to Fuji X-Mount Cameras


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Viltrox EF-FX1 PRO AF Adapter with Control Ring for Canon EF/EF-S Lenses to Fuji X-Mount Cameras

The Viltrox EF-FX1 Pro Lens Mount Adapter is designed to allow Canon EF or EF-S mount lenses to be used with FUJIFILM X-mount cameras, maintaining full electronic communication. The adapter features a detachable tripod foot with a 1/4"-20 accessory thread, allowing direct attachment to tripods or quick release plates. It also includes a USB-C port for easy firmware updates.

This 0.71x Lens Mount Adapter allows a full-frame Canon EF-mount lens to be mounted onto a FUJIFILM X-mount camera. The adapter’s optics maximize the connected lens’s apparent angle of view and provide a one-stop increase in the aperture range.

When a lens intended for 35mm film or similarly sized full-frame sensors is connected to a FUJIFILM X-mount camera, it projects a larger image than the APS-C sensor can capture, resulting in a "crop factor." The adapter condenses the light from the lens and projects it onto the APS-C sensor, effectively reducing the crop factor and providing an additional one stop of light per f/stop setting.

If the lens includes autofocus and camera-controlled aperture functions, the adapter supports these features. It also allows the generation and saving of Exif metadata when used with compatible lenses and cameras. Additionally, the adapter supports lens and in-camera image stabilization.

Constructed with four lens elements in four groups, the adapter ensures optical clarity and color fidelity. Note that this adapter is not suitable for use with the Viltrox FUJIFILM X-Pro3 camera and may scratch the camera body if attached.


Key Features:


Canon EF/EF-S Lens to FUJIFILM X-Mount

Maximizes the apparent angle of view of the combined camera and lens

Provides a one-stop increase in the aperture range

Four lens elements in four groups for optical clarity and color fidelity

Maintains autofocus and supports image stabilization

Supports electronic communication for autofocus, on-camera aperture control, and Exif metadata generation

Aperture control ring

Physical controls including a lever release for lens attachment

Detachable tripod foot with 1/4"-20 accessory thread for direct tripod attachment

Made from aluminum alloy and chromium-plated brass

All-metal design

Weight: 85 grams

Dimensions: 79mm x 24mm

USB-C port for firmware updates




Camera Mount: FUJIFILM X

Lens Mount: Canon EF/EF-S

Electronic Communication: Yes

Inputs/Outputs: 1x USB-C Firmware Update Input

Display: No

Material: Aluminum, Brass




12 Month Warranty 


What's in the Box:


1 x Viltrox EF-FX1 Pro Lens Mount Adapter for Canon EF or EF-S mount lens to FUJIFILM X-mount camera

1 x Front body cap

1 x Rear body cap

1 x Instruction Manual 

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