Tamron released 17-28mm F/2.8 Di III RXD FE lens firmware update v2 to fix the following issues:
1. The back monitor of camera instantly flashes when the shutter button is pressed halfway.
2. AF doesn’t work properly after the camera recovers from the sleep mode or power off.
Order Tamron 17-28mm f/2.8 Di III RXD FE Lens from B&H Photo | Amazon
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