You Can Now Use Viltrox Lenses with Sony a7 V Thanks to Firmware Update

Viltrox and Sony a7 V compatibility isn’t just a dream anymore. Some third-party lenses have reportedly been behaving quirky with the latest Sony camera, and Viltrox wasn’t an exception. But with the latest firmware update, a range of the company’s lenses is going to become compatible with the Sony a7 V.

What Was the Issue?

According to Imaging Resource, photographers and videographers who used the a7 V complained about autofocus and other issues when using some third-party lenses with the camera. Kai Wong drew the broader attention to the problem after posting a video where he tested out the Sony a7 V. He was struggling to use several third-party lenses with the camera. It just… Wasn’t working.

This bug particularly hit Chinese-made lenses, so as you can imagine – the rumors began. Some users claimed it’s not a bug, it’s a feature, accusing Sony of intentionally limiting third-party lenses on its new camera. However, Viltrox cleared the air claiming that they didn’t think it was intentional.

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“Nothing we’ve seen so far suggests any intentional behavior on the camera side,” said Frank Fang, Viltrox’s US Marketing Director. “This appears to be part of the normal post-release optimization that often occurs as new camera systems are introduced.”

And this leads us to the good news: Viltrox and Sony a7 V compatibility is coming.

Which Viltrox Lenses are Compatible with the Sony a7 V

Viltrox posted on X promising compatibility of 12 of its lenses with the Sony a7 V. What’s more, they also promise to add more lenses to the list. For now, you can expect the firmware updates for these lenses to fix the Sony issue:

• AF 135mm F1.8 LAB FE V1.28
• AF 15mm F1.7 Air E V1.04
• AF 35mm F1.2 LAB FE V1.09
• AF 85mm F1.4 Pro FE V1.09
• AF 35mm F1.7 Air E V1.05
• AF 75mm F1.2 Pro E V1.08
• AF 27mm F1.2 Pro E V1.20
• AF 20mm F2.8 Air FE V1.13
• AF 50mm F1.8 FE V1.08
• AF 24mm F1.8 FE V1.07
• AF 28mm F1.8 FE V1.08
• AF 25mm F1.7 Air E V1.05

#Viltrox Latest Firmware Update.

⚠️More lenses will be added for compatibility with the Sony A7M5. Please stay tuned!
🔗 PC client file download at https://t.co/qNE8pWFDol
📪Viltrox Product Bug Feedback Channel comm.support@viltrox.com pic.twitter.com/fIMt8j5WlZ

— VILTROX (@ViltroxOfficial) December 22, 2025

So, no, Sony didn’t secretly declare war on third-party lenses or Chinese lenses. This looks a lot more like the usual new camera growing pains, and Viltrox just showed up with the fix. So, if you’ve had your eyes on the a7 V but hesitated because your Viltrox glass might throw a tantrum, this firmware update could be the sign you were looking for.

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[via PetaPixel]

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