Nikon NIKKOR Z 58mm f/0.95 S Noct vs. Nikon NIKKOR Z 135mm f/1.8 S Plena

Ray-traced side by side from their optical patents for the same upper-body portrait framing: compare the Nikon NIKKOR Z 58mm f/0.95 S Noct (2.3 m working distance, 61.1 mm pupil) against the Nikon NIKKOR Z 135mm f/1.8 S Plena (5.4 m working distance, 75.0 mm pupil).

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Portrait At-a-Glance Comparison (Upper Body Framing)

Optical & Portrait Metric Nikon NIKKOR Z 58mm f/0.95 S Noct Nikon NIKKOR Z 135mm f/1.8 S Plena What It Means in Practice
Upper-Body Working Distance 2.33 m 5.40 m The Nikon NIKKOR Z 135mm f/1.8 S Plena requires 3.1 m more room behind you for the same subject size.
Effective Focal Length (Breathing) 59.9 mm (+3.2%) 130.2 mm (-3.6%) Nikon NIKKOR Z 58mm f/0.95 S Noct frames like 59.9 mm (+3.2%) at 2.3 m; Nikon NIKKOR Z 135mm f/1.8 S Plena frames like 130.2 mm (-3.6%) at 5.4 m.
Depth of Field (Sharp Zone) 13 cm (2.27 m – 2.40 m) 25 cm (5.28 m – 5.53 m) The Nikon NIKKOR Z 58mm f/0.95 S Noct has a 47% thinner focus zone (13 cm vs. 25 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 61.1 mm (f/0.95) 75.0 mm (f/1.8) Distant background blur discs are 23% larger on the Nikon NIKKOR Z 135mm f/1.8 S Plena.
Minimum Focus Distance 0.5 m 0.82 m Nikon NIKKOR Z 58mm f/0.95 S Noct focuses 32 cm closer (0.5 m vs. 0.82 m) for tighter close-ups.
Patent Prescription WO2019229849A1 (17/10) WO2024147268A1 (16/14) Published optical prescriptions traced in the 3D simulator above.

Questions

Which blurs the background more, Nikon NIKKOR Z 58mm f/0.95 S Noct or Nikon NIKKOR Z 135mm f/1.8 S Plena?

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 NIKKOR Z 135mm f/1.8 S Plena at f/1.8 has a 75.0 mm entrance pupil.

How does working distance differ between Nikon NIKKOR Z 58mm f/0.95 S Noct and Nikon NIKKOR Z 135mm f/1.8 S Plena?

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 NIKKOR Z 135mm f/1.8 S Plena stands 5.40 m away (sharp zone 25 cm, from 5.28 m to 5.53 m).

How do the optical designs of Nikon NIKKOR Z 58mm f/0.95 S Noct and Nikon NIKKOR Z 135mm f/1.8 S Plena 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 NIKKOR Z 135mm f/1.8 S Plena uses 16 elements in 14 groups (WO2024147268A1, effective focal length 130.2 mm).

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Also see: depth of field, bokeh, crop factor, lens compression.