Nikon F90
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The Nikon F90 (known as the N90 in North America) is a 'prosumer' camera. At the time of its release it was noted for its relatively fast autofocus speed compared to previous Nikon models, which had lagged behind competitor Canon's. It was thus seen by many as a 'stop-gap' measure to prevent the mass-migration of many Nikon-using professional photographers to Canon, as Nikon's next fully-professional camera, the F5, was some time away from release. The Nikon F4, the professional model available at the time of the F90's release, had very slow autofocus compared to Canon's autofocus SLRs.
The Nikon F90's autofocus system was driven by a small 'peanut' motor in the lens body that drove the lens via a mechanical link, unlike Canon's autofocus system which used motors built into each lens.
Despite not being a 'fully professional' camera, the Nikon F90 and its upgrade, the F90X, were built to a high standard and were (and are still) used by many professionals.