150-500mm A057 Firmware Ver. 4: Key Improvements

The 150-500mm A057 firmware Ver. 4 is now available for the Sony E-mount version of the TAMRON 150-500mm F/5-6.7 Di III VC VXD. Released on December 4, 2025, the firmware improves autofocus performance during zooming, enhances the AF Assist function, and adds support for continuous shooting at up to approximately 120 frames per second with the Sony α9 III in specific focus modes.

This firmware update is intended specifically for the 150-500mm F/5-6.7 Di III VC VXD (Model A057) for Sony E-mount. Users with an earlier firmware version should check their current lens firmware and update to Ver. 4 to take advantage of the latest improvements.

150-500mm A057 Firmware Ver. 4: What’s New?

The latest firmware provides three key improvements for the Sony E-mount A057:

• Improved AF performance during zooming

• Continuous shooting at up to approximately 120 fps with the Sony α9 III

• Improved AF Assist function

The improvements are particularly useful for photographers and videographers who use the 150-500mm A057 for wildlife, sports, birds, action and other subjects that require responsive autofocus.

Firmware Information

TAMRON’s official firmware support page currently lists Ver. 4 as the latest firmware for the Sony E-mount A057.

Improved Autofocus During Zooming

One of the main improvements in Ver. 4 is enhanced AF performance during zooming.

The 150-500mm A057 covers a wide telephoto range, allowing photographers to quickly move between 150mm and 500mm depending on the subject and shooting situation. When tracking moving subjects, changing focal length while maintaining autofocus can be demanding.

The new firmware improves AF performance during zooming when shooting both still images and video in AF-C mode. This can provide more consistent autofocus behavior when the photographer needs to adjust the composition while continuing to follow a moving subject.

This improvement can be especially useful for:

• Wildlife photography

• Bird photography

• Sports photography

• Outdoor action

• Video recording

• Moving subjects

Support for Approximately 120 fps Continuous Shooting

The firmware also adds support for continuous shooting at up to approximately 120 frames per second when the A057 is used with the Sony α9 III.

This functionality is available when the camera’s focus mode is set to:

• AF-S

• DMF

• MF

The high-speed shooting capability can help photographers capture precise moments during fast-moving action, such as birds in flight, sports movements or other rapidly changing scenes.

Photographers using the Sony α9 III with the 150-500mm A057 can therefore take advantage of the camera’s high-speed continuous shooting capabilities with the updated lens firmware.

Improved AF Assist Function

The third major improvement in the 150-500mm A057 firmware Ver. 4 is an update to the lens’s AF Assist function.

AF Assist is designed to support autofocus operation in compatible shooting situations. The improved function further enhances the overall autofocus behavior of the lens when paired with compatible Sony camera bodies.

Combined with the improved AF performance during zooming, this makes Ver. 4 a useful firmware update for photographers who depend on responsive autofocus.

Why Update the 150-500mm A057?

Firmware updates can improve communication and functionality between a lens and compatible camera body.

For a long-range telephoto lens such as the 150-500mm A057, autofocus performance is particularly important. Wildlife and sports photographers often need to react quickly as subjects move through the frame.

The Ver. 4 improvements address several areas that can matter during these demanding shooting situations:

Faster-paced shooting: Improved AF during zooming can help when changing focal lengths while following a subject.

Action photography: Support for approximately 120 fps continuous shooting with the Sony α9 III provides more opportunities to capture critical moments.

Improved autofocus assistance: The updated AF Assist function further improves the lens’s autofocus-related operation.

How to Update the A057 Firmware

For the Sony E-mount version of the 150-500mm A057, the firmware should be updated through the camera body.

TAMRON provides the firmware download and update instructions through its official support page. Before starting the installation, users should carefully read the available instructions and make sure the camera has sufficient battery power.

Before Starting the Update

Before installing the firmware:

1. Confirm that your lens is the 150-500mm F/5-6.7 Di III VC VXD (Model A057).

2. Confirm that you are using the Sony E-mount version.

3. Check the firmware version currently installed on the lens.

4. Make sure the camera battery has sufficient charge.

5. Follow TAMRON’s official firmware instructions.

6. Do not interrupt the firmware installation process.

Once the firmware has been updated to a newer version, TAMRON notes that it is not possible to revert to an older firmware version.

How to Check Your Lens Firmware

Before downloading the firmware, check the current firmware version installed on your A057.

If the lens is already running Ver. 4, no further update is required for the improvements described in this notice.

If an earlier version is installed, users can follow TAMRON’s official update procedure to install the latest available firmware.

The official TAMRON firmware page also provides previous firmware versions and their corresponding improvements, including earlier AF tracking and Vibration Compensation-related updates.

Sony E-Mount A057 Firmware Compatibility

The 150-500mm F/5-6.7 Di III VC VXD (Model A057) is available for multiple mirrorless mounts. However, this particular firmware notice applies to the Sony E-mount version.

TAMRON maintains separate firmware information for different lens mounts, so users should make sure they select the correct mount before downloading firmware.

The official A057 specifications page identifies both Sony E and Nikon Z versions of the lens, while the dedicated firmware page identifies Ver. 4 for the Sony E-mount model.

150-500mm A057 for Wildlife and Sports

The 150-500mm A057 is designed as a high-reach telephoto zoom for full-frame mirrorless cameras.

Its 150-500mm focal-length range provides substantial reach for subjects such as birds, wildlife and sports. The lens also incorporates TAMRON’s VXD linear motor focus mechanism and VC image stabilization.

The optical construction uses 25 elements in 16 groups, including one XLD, five LD and two hybrid aspherical elements. TAMRON also uses BBAR-G2 coating to help control ghosting and flare.

These features make reliable autofocus and stabilization particularly important when the lens is used for demanding telephoto applications.

Keep Your Lens Firmware Updated

Keeping lens firmware current can help maintain compatibility and performance with supported camera bodies.

The 150-500mm A057 firmware Ver. 4 specifically improves AF performance during zooming, adds support for approximately 120 fps continuous shooting with the Sony α9 III under specified focus modes, and improves AF Assist.

For future camera or lens firmware releases, users should check TAMRON’s official support pages for the latest information.

Firmware requirements can differ between mounts and camera models, so always verify that the firmware you are downloading is intended for your specific lens and mount.

Important Firmware Update Information

Before installing the firmware, carefully read TAMRON’s official instructions.

Users should also make sure they have selected the correct firmware for the Sony E-mount A057.

If a firmware installation fails or the lens continues to experience problems after updating, TAMRON recommends contacting the appropriate local TAMRON distributor or service center for assistance.

Current Firmware Status

As of the latest official TAMRON information, Ver. 4 is the latest firmware for the Sony E-mount 150-500mm F/5-6.7 Di III VC VXD (Model A057).

The firmware was released on December 4, 2025.

Key Improvements at a Glance

*Available with the Sony α9 III when its focus mode is set to AF-S, DMF or MF.

Conclusion

The 150-500mm A057 firmware Ver. 4 provides important performance improvements for Sony E-mount users.

The update improves autofocus performance during zooming, enhances the AF Assist function, and adds support for continuous shooting at up to approximately 120 frames per second with the Sony α9 III when using AF-S, DMF or MF focus modes.

If your 150-500mm A057 for Sony E is running an earlier firmware version, check the official TAMRON support page and follow the recommended update procedure.

Keeping the lens firmware current helps ensure that the A057 can take advantage of supported improvements and maintain reliable performance with compatible Sony cameras.