Nikon has expanded its Z mirrorless system to include models with the DX (APS-C) sensor size, in addition FX (full-frame) cameras and lenses already in the catalog. The Nikon Nikkor Z DX 16-50mm f/3.5-6.3 VR ($299.95) is the first standard zoom lens that's purpose-built for the smaller sensor format. It's a fine starter lens, with solid wide-angle coverage, optical stabilization, and nearly silent autofocus, but it isn't as sturdily built or sealed as the full-frame Z lenses released to date. If you're buying a Z 50, you should certainly opt for the kit that bundles this lens, cutting its cost to about $140.

Collapsible Design

The DX 16-50mm is a collapsible lens—its optics retract into the barrel when not in use. When attached to the Z 50, I'm able to carry the pair in the pocket of a winter coat without a problem. The lens itself measures 1.3 by 2.8 inches when collapsed, weighs just 4.8 ounces, and supports 46mm front filters.

The compact design omits a lens hood, but I didn't have issues with flare, even when the sun was right at the edge of the frame. Apart from the optical glass, construction is all plastic, but it's on the higher end of quality for the material. Even so, I would have preferred to see Nikon include a metal lens mount.

Nikon says the lens has the same level of dust and splash protection as the Z 50 and many of its other sub-$1,000 camera models. I'd feel comfortable using it in light precipitation, but the sealing isn't on the same level as full-frame lenses and cameras.

There are two control rings on the lens. The zoom is further forward. It turns freely from 16-50mm, but offers some resistance when moving in and out of the collapsed position. Thankfully there's no lock switch to deal with—you just need to apply a little torque.

The manual focus ring sits farther back. While you'll likely opt for autofocus most of the time, it's good that it's comfortable to reach. The focus response changes with the speed you turn the ring—a quicker twist makes a more dramatic change in focus, and you'll use slow adjustment for precise changes.

You can also use the ring as an additional control, with the option to adjust EV or lens aperture. Unfortunately, the ring is just a little too sensitive. I found it hard to make third-stop EV or aperture adjustments without taking care to turn the ring ever so slightly. This is an issue across the Z line, and one that I hope Nikon is able to address via firmware updates.

The macro focus capability is modest. The lens focuses as close as 7.9 inches, netting 1:5 life-size macro magnification when zoomed all the way in. It's pretty typical, just about matching what similar lenses for Fujifilm and Sony systems can do. Nikon's take does minimize focus breathing, a change in angle of view when adjusting focus, which is desirable for video work.

Image stabilization is beneficial for both video and still imaging. It smooths out jittery motion in handheld footage, and makes it possible to get handheld shots at longer shutter speeds, so you can blur motion or work at a lower ISO. It's included in the lens, a good thing as the Z 50 body doesn't have a stabilized sensor.

Sharp Results

I tested the Z 16-50mm with the 20.9MP Z 50 and software from Imatest. At 16mm f/3.5 it delivers excellent resolution (2,580 lines) averaged across the frame. Edges and corners are quite soft, though—you'll want to set the lens somewhere between f/5.6 and f/11 for the shots where edge and corner resolution matters. Average resolution also improves—the lens nets outstanding contrast, as good as you can expect from the Z 50's sensor—through f/11. Diffraction slightly softens images at f/16 and f/22.

At the midpoint of the zoom, around 35mm, the maximum aperture is f/5.3. Resolution is still excellent (2,630 lines), with edge performance that lags behind, but is still pretty good (1,975 lines). Again, for landscape shots, f/8 and f/11 offer the best resolution from center to edge, with excellent performance through the frame. The aperture narrows all the way to f/36 at this focal length, but results are almost soft focus (1,220 lines).

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At the 50mm setting, the maximum aperture is just f/6.3. Aside from a loss of light gathering, though, results are just about the same as at 35mm. Simply put, the lens has no problem delivering as much resolution as the Z 50's sensor can manage. That said, it's by no means a camera that leads its class in resolution—Canon offers similar models with 32.5MP chips, and you can only imagine that Nikon will want to better its rival in the future.

Images show no barrel or pincushion distortion, and while you may notice a slight vignette at 16mm f/3.5, it's not an issue when zoomed or when the aperture is narrowed. It's possible to turn off vignette correction, which nets a more visible effect at 16mm. You may like it for environmental portraits and other shots where you want a natural frame to help isolate your subject.

Shines in Good Light

Let's face it, a small zoom with an unambitious f/3.5-6.3 aperture isn't going to excite photographers who love shots with delectably shallow focus and smooth, blurred out backgrounds. That's what full-frame cameras and f/2.8 zooms—or even better, f/1.4 primes—are for. Those types of lenses are generally big and expensive.

You reach for a lens like the Nikkor Z DX 16-50mm f/3.5-6.3 VR for everyday photography. It puts all the emphasis on size, pairing well with the lightweight Z 50. The dim aperture does mean you'll want to use it under the sun, in brightly lit interiors, or with the aid of a flash, though. But for vacation shots, you often have plenty of light, and want a lightweight kit.

You don't have a lot of options for zoom lenses for the Z 50, though. Nikon promises to deliver an 18-140mm at some point in the future, and while you can certainly use the Nikkor Z 14-30mm f/4 S, the full-frame zoom is pricier and omits stabilization. The 24-70mm f/4 is another premium option, and one that balances well on the Z 50, but you probably want a zoom that's wider for a DX sensor camera.