Nikon NIKKOR Z 58mm f/0.95 S Noct vs. Nikon 58mm f/1.4 G FX

Ray-traced side by side from their optical patents at a 2.3 m upper-body portrait distance: compare how the Nikon NIKKOR Z 58mm f/0.95 S Noct (61.1 mm entrance pupil) and Nikon 58mm f/1.4 G FX (41.4 mm entrance pupil) differ in background blur size, edge bokeh, and depth of field.

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Optical & Portrait Metric Nikon NIKKOR Z 58mm f/0.95 S Noct Nikon 58mm f/1.4 G FX What It Means in Practice
Upper-Body Working Distance 2.33 m 2.33 m Identical working distance—both frame an upper-body portrait from the exact same spot.
Effective Focal Length (Breathing) 59.9 mm (+3.2%) 58.6 mm (+1.0%) At 2.3 m, Nikon NIKKOR Z 58mm f/0.95 S Noct frames like a 59.9 mm lens while Nikon 58mm f/1.4 G FX frames like a 58.6 mm lens.
Depth of Field (Sharp Zone) 13 cm (2.27 m – 2.40 m) 20 cm (2.24 m – 2.44 m) The Nikon NIKKOR Z 58mm f/0.95 S Noct has a 32% thinner focus zone (13 cm vs. 20 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 61.1 mm (f/0.95) 41.4 mm (f/1.4) Distant background blur discs are 48% larger on the Nikon NIKKOR Z 58mm f/0.95 S Noct.
Minimum Focus Distance 0.5 m 0.58 m Nikon NIKKOR Z 58mm f/0.95 S Noct focuses 8 cm closer (0.5 m vs. 0.58 m) for tighter close-ups.
Patent Prescription WO2019229849A1 (17/10) JP2013-019993A (9/5) Published optical prescriptions traced in the 3D simulator above.

Pytania

Which blurs the background more, Nikon NIKKOR Z 58mm f/0.95 S Noct or Nikon 58mm f/1.4 G FX?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Nikon NIKKOR Z 58mm f/0.95 S Noct at f/0.95 has a 61.1 mm entrance pupil, while Nikon 58mm f/1.4 G FX at f/1.4 has a 41.4 mm entrance pupil.

How does working distance differ between Nikon NIKKOR Z 58mm f/0.95 S Noct and Nikon 58mm f/1.4 G FX?

For an upper-body portrait, Nikon NIKKOR Z 58mm f/0.95 S Noct stands 2.33 m from the subject (sharp zone 13 cm, from 2.27 m to 2.40 m), whereas Nikon 58mm f/1.4 G FX stands 2.33 m away (sharp zone 20 cm, from 2.24 m to 2.44 m).

How do the optical designs of Nikon NIKKOR Z 58mm f/0.95 S Noct and Nikon 58mm f/1.4 G FX compare?

Nikon NIKKOR Z 58mm f/0.95 S Noct uses 17 elements in 10 groups (WO2019229849A1, effective focal length 59.9 mm at portrait distance). Nikon 58mm f/1.4 G FX uses 9 elements in 5 groups (JP2013-019993A, effective focal length 58.6 mm).

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