From Tokina:
Tokina atx-m series E mount lens firmware update announcement
Dear Customers,
We sincerely thank you for your continued patronage and support of Tokina lenses.
We have found that some Tokina atx-m E mount lenses (below) may be subject to possible compatibility difficulties with upcoming camera firmware updates, or certain camera models to be released in the future.
In light of this, we would kindly ask that you check the firmware version of your lens, and update it accordingly if necessary. Steps on updating your lens' firmware can be found below. We deeply apologize for the inconvenience caused.
Target models
Tokina atx-m 85mm F1.8 FE (EAN code: 4961607634486) Tokina New atx-m 85mm F1.8 FE (EAN code: 4961607640418) Tokina atx-m 23mm F1.4 E (EAN code: 4961607634585) Tokina atx-m 33mm F1.4 E (EAN code: 4961607634622) Tokina atx-m 56mm F1.4 E (EAN code: 4961607634639)
Update requiring products
Lens models with [02] stickers affixed to two sides of the package are the latest version. A firmware update is required for lens models that do not have this sticker affixed.
You can also check the version by selecting [MENU] ?[Setup]?[Version Display] in your camera. If the version display shows Lens Ver.02, the latest firmware is installed. Versions prior to "02" require a firmware update.
Firmware update procedure
Tokina atx-m 85mm F1.8 FE
Please contact Tokina support center directly or contact Tokina Official distributor in your country. In the message title please write: "Tokina atx-m 85mm firmware update request".
Contact form is here. Tokina Official distributor list is here.
Tokina atx-m 23mm F1.4 E | Tokina atx-m 33mm F1.4 E | Tokina atx-m 56mm F1.4 E
Please kindly update the firmware by yourself. The firmware update procedure is described in Downloads section.
Contact Information
Please use our Feedback form to contact Tokina support center for any questions or support on the matter.
From Tokina:
Thank you for Your constant support to Tokina brand. We here by announce the availability of a firmware update for Tokina FíRIN 20mm F2 FE AF lens.
Benefits of this firmware update
With this firmware update the auto-focus performance of Tokina FíRIN 20mm F2 FE AF in AF-C mode at high-speed shooting (Hi+/Hi/Mid) when used with Sony a7III, Sony a7RIII, Sony a9 cameras will be improved (when used with Sony a9 auto-focus tracking will work only in Mechanical Shutter type AF-C mode).
Product
Tokina FíRIN 20mm F2 FE AF for Sony E-mount (EAN code: 4961607634509)
For the firmware update procedures and further instructions please contact the shop where the lens has been purchased. For more information please contact your local official Tokina Distributor or contact us.