Sigma Sigma Bigma 50-500mm AF Clicking Noise


New Member
Hi Guys,

Newbie here, just purchased a used Bigma and I was wondering if you could help me diagnose this clicking noise, I'm not sure if this is normal for the Bigma or not, but it would make a slight noise when it stops at position when auto focusing. It moves smooths from one end to the other, just clicks when it stops.

I know with some of my other lenses, when the lens tries to auto focus, it would make a noise kind of like a cordless drill, but this Bigma does not. The pictures come out fine at different zoom lengths, and it's fast to take pictures. The video below shows me auto focusing in and out of different objects.

This is mounted on a Nikon D90 with a full charge battery. *Note, might have to turn up the volume.

Thanks in Advance.

Link 1:

Link 2:

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