Notice about 18-300mm F/3.5-6.3 Di III-A VC VXD (Model B061) for CANON RF mount

We sincerely thank you for your continued support of TAMRON products.

We've found an incompatibility issue between our 18-300mm F/3.5-6.3 Di III-A VC VXD lens (Model B061) and Canon's EOS R5 Mark II and EOS R1 cameras.
This issue occurs when the cameras are updated to the latest firmware (Ver. 1.1.1 for the R5 Mark II, Ver. 1.1.2 for the R1) released in July 2025.

We are currently verifying the cause of this issue. 
Updates will be informed on our support information page as soon as we have any solutions.