30 interactive lens diagrams
Nikon mirrorless mount, introduced in 2018 | Full-frame FX and APS-C DX mirrorless
Nikon Z was designed as a clean mirrorless reset after decades of F-mount continuity. Its 55 mm inner diameter and 16 mm flange focal distance give designers more freedom for large rear elements, fast normals, high-performance wide angles, and compact lenses that would be difficult on a reflex body. The wide throat also gives Nikon room to pursue unusually fast lenses while keeping more symmetrical or less strained rear-group layouts available.
The mount covers both full-frame FX and APS-C DX mirrorless cameras, with lens format rather than mount id distinguishing the intended image circle. Nikon also built the FTZ adapter path around the historical importance of F-mount lenses while keeping native Z optics free from SLR mirror clearance. That makes Z pages a natural place to compare adapted continuity against formulas designed from the start for the shorter register.
Z lenses often show Nikon using the new geometry to reduce aberrations at wide apertures, flatten fields, and simplify retrofocus wide-angle layouts compared with F-mount DSLR designs. The Noct and other fast S-line lenses are especially clear examples of the mount's optical ambition, while compact DX and pancake-style lenses show the same mount serving smaller everyday systems.
Flange focal distance 16 mm, bayonet mount. 0° at 12 o'clock from the camera front; the lens-side view is the horizontal mirror. Dotted strokes mark photo-scaled or schematic (not-to-scale) dimensions.