Sigma MC-11 Firmware update

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Ceistinne Senior Member • Posts: 1,760
Sigma MC-11 Firmware update

Does anyone know why Sigma says "※Before attaching the updated SIGMA MOUNT CONVERTER MC-11 to the camera body, please remove the battery pack from the camera and put it back in again"  after updating the MC-11 Firmware,

Surely having the camera e.g. A6xxx or A7, A9, having the camera turned off should have the same effect. 
S

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