Spróbowałem... i nic nie dało

"Thank you for choosing Sigma products.



It is up to each individual service center of their pricing.



But generally some service centers will offer the upgrade free but charge for the labor and the shipping, others may just charge shipping.

In many cases it is not just an upgrade that is needed to get the flash to communicate properly and it may need other work done to support the upgrade and newer technology in the camera."