Problem with EOS R6 - viltrox EF-R adapter / Canon 100-400 Lens MK1

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Deep Jungle Home New Member • Posts: 4
Problem with EOS R6 - viltrox EF-R adapter / Canon 100-400 Lens MK1

I use a viltrox EF-R adapter on my EOS R6 with a Canon 100-400 Lens MK1 The lens keeps focus hunting even when idle, ie holding the camera setup in my hand. This really drains out the battery. Not sure if it is due to the old lens or the adaptor mismatch with the camera.

Due to this issue, Have not been able to take quick shots or inflight shots of birds.

Any advise on what may be the issue?

TIA

Bala

 Deep Jungle Home's gear list:Deep Jungle Home's gear list
Canon EOS R6 Canon EF 100-400mm f/4.5-5.6L IS USM Canon RF 24-105mm F4L IS USM +1 more
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Canon EOS R6
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