Sony a7r2 - focus keeps changing during bulb mode

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Eden_808 Regular Member • Posts: 212
Sony a7r2 - focus keeps changing during bulb mode

I was just reminding myself how my external intervalometer works in preparation for the Perseids meteor shower and something weird is happening. I've set it to manual focus and locked focus at infinity, but when I flip it into bulb mode the camera starts hunting for focus between exposures during the timelapse. But it definitely says 'MF' on the screen. Also when I press the shutter half way while in bulb, the auto focus kicks in... Any idea on how to stop this from happening?

 Eden_808's gear list:Eden_808's gear list
Sony a7R II Samyang 14mm F2.8 ED AS IF UMC Sony FE 85mm F1.8 Tamron 28-75mm F2.8 III Tamron 17-28mm F2.8 Di III RXD
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