Len's optic jumping between 17-24 on sigma 17-70 f2.8-4 Macro OS HSM

by user2440943   Last Updated November 08, 2017 12:18 PM

I've bought a used lens and I would I am unsure if I should return it.

The an inner element visibly jumps between the 17-24 mark. It does not interfere with function or focusing. However is this an early sign of damage that I should avoid?

I've never experienced this on a previous lens.

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