The Viltrox AF 28/4.5 has a USB-C port on its flange.
I expected to be able to update the firmware using the USB-C port (like the Viltrox 20/2.8). However, when I connected the 28/4.5 to a PC, no new devices were detected. In fact, I was beginning to think the lens was broken.
I also noticed that there are no firmware files to download, just links to the App Store and Google Play.
Yes, this lens updates its firmware via Bluetooth with a mobile application. The USB-C port is for powering the lens during the update.
I successfully updated the firmware from v1.05 to v1.06 using Viltrox Lens application for Android:
I dislike using a mobile application to control hardware. Are you sure that the application will still be available in a few years and that you can run it on modern mobile devices?
In addition, the Viltrox application requires you to create an account. The serial number of a lens is linked to your personal data in an unknown service. This can be used against you.
Drivers for... lenses. With personification. Don't like? - Don't buy.
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