When Nikon launched its Z-mount platform with two Full-Frame Mirrorless Digital Cameras, it started a new line of compatible lenses and suspiciously specified the angle-of-view of each lens in both Full-Frame and APS-C terms, accounting for the 1.5X Crop-Factor of the latter. This foreshadowed the launch of the Nikon Z50 reviewed here, currently the only Z-mount camera with an APS-C sensor.
Even though the Nikon Z50 is compatible with all Z-mount lenses, those projecting a Full-Frame imaging circle are much larger and heavier than needed, negating the one true advantage of a smaller sensor. To address this, and that the Nikon Z50 does not feature builtin image-stabilization, Nikon released two DX lenses, both with stabilization, along with the Z50 announcement.
These new lenses are designed for compactness above all else, resulting in lightweight lenses that are very small for their focal-range, but also rather dim. A roundup of Nikon Z-Mount DX lenses was started at Neocamera with both the DX 16-50mm F/3.5-5.6 VR and DX 50-250mm F/4.5-6.3 VR each getting a review.