90D with Error 30

[Tonvogels]

My Canon 90D gives me an error 30. But only when the Tamron 100-400 is attached the Canon lenses are OK.
I cleaned the lens contacts, reset the camera to factory settings with no results. The lens works fine on another canon body. But just the combination 90D and Tamron is a no go since this morning. Anyone ideas?

[deebatman316]

When does the error code pop up. Does it pop up when you turn the camera on. Or does it pop up when you try to take a picture. What is the FULL NAME of the Tamron lens. Canon doesn’t ensure compatibility with 3rd Party lenses. It’s up to Tamron to ensure compatibility NOT Canon.

[Tonvogels]

It’s a Tamron 100-400 and worked great the last 3 years. 

[deebatman316]

What’s the FULL NAME Tamron 100-400mm is not enough. Tamron has made multiple lenses with that focal length.

[Tonvogels]

Tamron 100-400mm f4,5-6,3 Di VC US