How to Update Tamron 28-75mm F2.8 Di III RXD (A036) Firmware with Your Sony Camera

The all-new Tamron 28-75mm F2.8 Di III RXD (aka Model A036) might just be the most coveted lens on the market this summer. Why? Because Tamron produced an $800 F2.8 constant-aperture zoom that delivers sharp, contrasty, colorful images in a way that competes with Sony's $2,200 24-70mm F2.8 G Master lens. It's such a value prospect that all the new Sony shooters ordered one and they're currently on backorder at retailers like B&H Photo-Video.

But there was one small hiccup upon release.

Some of the lenses, both review units and those sold to the public, had an intermittent AutoFocus bug where, mostly in video mode, the lens would fail to achieve proper focus despite picking a specific focal point. For some, the problem was consitent while others didn't experience the issue at all. For reference, we did experience the bug during our 28-75mm F2.8 Di III RXD Full Review.

Tamron immediately addressed the issue, announcing an impending firmware update to fix the problem. It took a little longer than many would have hoped, but I'm happy to announce that the A036 Firmware V2.0 is here and very easy to install. I had one minor issue during the process, but still managed to do the update in less than 10 mins from landing on Tamron's website to having a fully updated lens.

Tamron, naturally, has full instructions over on their site, but here's our quick version:

Step One: Gather the Following

To update the Tamron 28-75mm F2.8 Di III RXD (Model A036), you will need
  • a Sony camera body
  • a fully charged battery (or A/C power)
  • the Tamron 28-75mm F2.8 Di III RXD attached to the Sony body
  • a Windows PC (Windows 7 SP1, 8.1, or 10) OR a Mac (OS X 10.10-10.11 or macOS 10.12) with 200MB of free space and 512MB of RAM
Unfortunately, at this time, macOS 10.13 High Sierra is not supported.

Step Two: Checking Your Lens Firmware

With your Tamron lens connected to your Sony camera, hit the MENU button and navigate to SETUP 7/7. Then tap Version and you'll see both the camera and lens' current firmware versions. If you see Ver. 01, you need to do the update. If you see Ver. 02, congrats, your lens is already good to go.

Step Three: Download the Firmware Updater

Download links (and the user agreement) are located at the bottom of this page:

Step Four: Open the Updater & Connect the Camera to Your Computer

After opening the .exe file (PC) or .dmg file (Mac), the Firmware Updater will prompt you to connect your Sony camera to your computer via a USB cable. But, before you do this, make sure your camera's USB Connection settings are set to Mass Storage.

To check or change USB Connection settings, tap MENU, navigate to SETUP 4/7, and set your USB Connection settings to Mass Storage. Now you can connect your camera.

Step Five: Run the Update

The Firmware Updater software will automatically check your lens' firmware and transfer the file to the camera/lens. Make sure you have enough battery life, click NEXT, and avoid powering down the camera or touching anything. A progress bar will appear in the Firmware Updater as well as on your camera's rear LCD screen.

When you're done, you will be prompted to disconnect the camera, pop out the battery and put it back in, and re-check your lens firmware (see Step Two above).

If you're running Ver. 02, you're done!

If There's a Problem

Tamron has a few troubleshooting tips to check out HERE. My installation process did include one minor issue. During my first attempt, the Firmware Updater couldn't find our Sony A7 III loaner, so it suggested popping the battery out and back into the camera and restarting the Firmware Updater. This fixed the problem and my second attempt went flawlessly.

Does It Work?

In a word... Yes!

We've spent three extra days testing the Tamron 28-75mm F2.8 Di III RXD zoom lens on a Sony a7 III and encountered no AF issues in video or photo modes. Honestly, this lens performs so well -- it's lightning fast, accurate, and near-silent -- it's like having a native Sony G or G Master lens. Sony is making amazing cameras and we can't wait to see what more budget-saving offerings Tamron delivers in the future because they've set a very high bar.

Click HERE to BUY the Tamron 28-75mm F2.8 Di III RXD on!


BELOW to BUY from B&H!