Nikon NIKKOR Z 85mm f/1.2 S vs. Nikon NIKKOR Z 85mm f/1.8 S

Ray-traced side by side from their optical patents at a 3.4 m upper-body portrait distance: compare how the Nikon NIKKOR Z 85mm f/1.2 S (70.8 mm entrance pupil) and Nikon NIKKOR Z 85mm f/1.8 S (47.2 mm entrance pupil) differ in background blur size, edge bokeh, and depth of field.

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Comparación de retrato de un vistazo (medio cuerpo)

Optical & Portrait Metric Nikon NIKKOR Z 85mm f/1.2 S Nikon NIKKOR Z 85mm f/1.8 S What It Means in Practice
Upper-Body Working Distance 3.41 m 3.41 m Identical working distance—both frame an upper-body portrait from the exact same spot.
Effective Focal Length (Breathing) 87.1 mm (+2.4%) 83.7 mm (-1.6%) At 3.4 m, Nikon NIKKOR Z 85mm f/1.2 S frames like a 87.1 mm lens while Nikon NIKKOR Z 85mm f/1.8 S frames like a 83.7 mm lens.
Depth of Field (Sharp Zone) 17 cm (3.33 m – 3.49 m) 25 cm (3.29 m – 3.54 m) The Nikon NIKKOR Z 85mm f/1.2 S has a 33% thinner focus zone (17 cm vs. 25 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 70.8 mm (f/1.2) 47.2 mm (f/1.8) Distant background blur discs are 50% larger on the Nikon NIKKOR Z 85mm f/1.2 S.
Minimum Focus Distance 0.85 m 0.8 m Nikon NIKKOR Z 85mm f/1.8 S focuses 5 cm closer (0.85 m vs. 0.8 m) for tighter close-ups.
Patent Prescription US20260086320A1 (15/10) JP2020-173366A (12/8) Published optical prescriptions traced in the 3D simulator above.

Preguntas

Which blurs the background more, Nikon NIKKOR Z 85mm f/1.2 S or Nikon NIKKOR Z 85mm f/1.8 S?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Nikon NIKKOR Z 85mm f/1.2 S at f/1.2 has a 70.8 mm entrance pupil, while Nikon NIKKOR Z 85mm f/1.8 S at f/1.8 has a 47.2 mm entrance pupil.

How does working distance differ between Nikon NIKKOR Z 85mm f/1.2 S and Nikon NIKKOR Z 85mm f/1.8 S?

For an upper-body portrait, Nikon NIKKOR Z 85mm f/1.2 S stands 3.41 m from the subject (sharp zone 17 cm, from 3.33 m to 3.49 m), whereas Nikon NIKKOR Z 85mm f/1.8 S stands 3.41 m away (sharp zone 25 cm, from 3.29 m to 3.54 m).

How do the optical designs of Nikon NIKKOR Z 85mm f/1.2 S and Nikon NIKKOR Z 85mm f/1.8 S compare?

Nikon NIKKOR Z 85mm f/1.2 S uses 15 elements in 10 groups (US20260086320A1, effective focal length 87.1 mm at portrait distance). Nikon NIKKOR Z 85mm f/1.8 S uses 12 elements in 8 groups (JP2020-173366A, effective focal length 83.7 mm).

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Ver también: profundidad de campo, bokeh, factor de recorte, compresión.