Service Notice Issued for Tamron 18-400mm f/3.5-6.3 Di II VC HLD Lens

From Tamron Japan (translated):

Notice regarding the use of the 18-400mm F/3.5-6.3 Di II VC HLD (Model B028)

Thank you for your continued patronage of Tamron products.

We announce that when using our 18-400mm F/3.5-6.3 Di II VC HLD (Model B028) interchangeable lens for single-lens reflex cameras with Canon EOS R7 / EOS R10 via an EF-EOS R adapter, the following problems occurred. We have confirmed that this phenomenon occurs, so please let us know.

phenomenon

AF may not work properly when the shutter button is half-pressed, depending on the timing of the camera power ON/OFF.

Restoration method when trouble occurs

Remove and attach the lens, then turn the camera off and on again.

We plan to address this issue with a firmware update at a later date.