Nikon camera using other branded lenses

[I @ M]

I have Canon gear and have purchased Sigma lenses in the past. Then when a new Canon body comes out, the old Sigma lenses no longer work with the new body because the electronics are incompatible. That is because Canon does not publish its electronic interface and third party lens manufacturers have to guess how the camera behaves and how the lens should behave.

Did you think to contact the Sigma distributors in Australia and get them to do a (very inexpensive) rechip on the lenses.

We have two very capable Sigma lenses that were picked up relatively cheaply because I suspect the previous owners never investigated all options.

I would conservatively estimate 90% of the performance of the Nikon equivalent for around 50% of the cost.