Tamron 28-75 focus pulsing (in/out/in/out/in/out) in AF-C?

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Cablecutter New Member • Posts: 5
Tamron 28-75 focus pulsing (in/out/in/out/in/out) in AF-C?

Hi all,

I have a Tamron 28-75 that I purchased used.  It has firmware version 2.  When using AF-C the lens will occasionally hunt for focus indefinitely.  Even when focusing on high contrast areas.  Focus lock will never be achieved.

The issue occurs randomly, but does happen MORE often in mid/low light situations or when focusing on a low contrast area.

These are all situations where my adapted Sigma 35mm 1.4 focuses without issue.

Camera Body A7RII

Anyone else have this issue?

Best,

Rob

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