The second generation of the 7.5 mm F2.8 has been optimized in its optical structure. The front lens element now uses a single piece of glass with a higher refractive index to replace the cemented glass of the first generation. The rear group of optical glass now includes HOYA ED glass, which effectively improves chromatic aberration.

The image quality of the lens has been correspondingly enhanced. While various aberrations are corrected, the field of view has also significantly improved. The polishing process of the glass is more precise and complex than in the previous generation. The optical structure of the entire lens still consists of 11 lenses, but the overall optical length has been shortened, making the lens more compact than before.

The exterior design follows the style of the first generation and features a fully metal housing. The 7.5 mm F2.8 Mark II uses a housing oxidation process, and the color of the lens mount is now electroplated tungsten steel, making it more aesthetically pleasing, robust, and durable. It has been newly adapted to the Nikon Z mount, providing users with more options.

Note: Due to the large angle of view of the fisheye lens, the filter holder of the lens hood will block the imaging, so currently, no filter holder or lens hood is included.