Sigma 150-500mm F/5-6.3 APO HSM DG OS Lens for Nikon F. This lens is sold as spares as the autofocus does not function as it should. Also, does not work with newer Nikon DSLR (for example a Nikon D7500 on the latest firmware) so needs to be sent to SIGMA for a "RE-CHIP" - was tested with a Nikon D3S.
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