It's also an f/2.8 and FX. A same size Z DX 28/2.0 or 1.8 with metal in the build would appeal to me. This lens is clearly intended to be "relatively" inexpensive.
Dave
Not a lot has been said about the new 28mm lens yet. I agree it would have been nicer if it were faster than f/2.8. Even f/2.5 would be nice, making it a useful half stop faster than zooms covering the same focal length. I think f/1.8 or f/2 in the same size would compromise the optical design too much, or would have to be a DX lens. To maintain the same optical standards of the other FX 1.8 primes, it would need to be at least as big as the Z 35/1.8.
The outer appearance is obviously designed to mirror the older AI and AIS lenses. The lower part is styled like the old aperture rings but it appears to be a fixed part of the barrel. It's disappointing that it does not have a real aperture (or control) ring. In this respect I prefer the design of Fuji and Sony lenses with their dedicated aperture rings. I guess this section provides a useful surface for gripping the lens when attaching or removing from the camera, but the lens also has a chrome grab-ring similar to AI lenses. So much of the styling of this lens is for show rather than functional. I guess the "focus ring" can be configured to control the aperture or exposure compensation like the f/1.8 primes. Maybe this is useful a useful feature but it seems odd to control these functions using a focus ring
![Shocked :o](https://nikongear.net/revival/Smileys/default/shocked.gif)
It even keeps the same 52mm filter size as AI lenses. I think it is a shame the new Z 50mm micro, 24-50 and 16-50 don't share the same filter size, it would be nice to see some standardization in Z lenses.
The optical design is interesting, with a small front element and progressively larger lenses towards the rear, including two aspherical elements. It focuses to 0.19m, a shade less than the AIS 28/2.8. The maximum reproduction ratio is only 1:5, compared to 1:3.9 for the AIS lens, probably due to focal length shortening at close range.
![](https://imaging.nikon.com/lineup/lens/z-mount/z_28mmf28_se/img/lensconstruction.png)
The MTF is very high within the DX image circle. Performance towards the FX corners drops off but is still relatively good:
![](https://imaging.nikon.com/lineup/lens/z-mount/z_28mmf28_se/img/mtf.png)