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edited Nov 8, 2017 at 21:20

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

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?

Notes:

Switched On: present

Switched Off: absent

OS On: Present

OS Off: Present

AF: Present

MF: Present

I've never experienced this on a previousreturned the lens because I don't believe that OS should results in a movement so distinct, so I'm inclined to believe this is loose element.

Video: https://www.youtube.com/watch?v=fdjPqfgDuug

This question is not related to lens design, or more general optics; minor grammar fixes in title and body

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edited Nov 8, 2017 at 16:00

scottbb ♦

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Len's Lens optic jumping between 17-24 on sigmaSigma 17-70 f2f/2.8-4 DC Macro OS HSM

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

The anAn 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.