EOS 90D and Tamron 150-600mm problems

Started 11 months ago | Questions thread
stevejenn Veteran Member • Posts: 4,334
Re: EOS 90D and Tamron 150-600mm problems

The only way to upgrade the firmware on the G1 is to send the lens into Tamron.  The G2 upgrades via the optional Tap-in console.

Steve J

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