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Fujifilm XF 56mm F1.2 R WR vs. Fujifilm XF 90mm F2 R LM WR

Ray-traced side by side from their optical patents for the same upper-body portrait framing: compare the Fujifilm XF 56mm F1.2 R WR (3.4 m working distance, 46.7 mm pupil) against the Fujifilm XF 90mm F2 R LM WR (5.5 m working distance, 45.0 mm pupil).

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Porównanie portretowe w skrócie (popiersie)

Optical & Portrait Metric Fujifilm XF 56mm F1.2 R WR Fujifilm XF 90mm F2 R LM WR What It Means in Practice
Upper-Body Working Distance 3.42 m 5.49 m The Fujifilm XF 90mm F2 R LM WR requires 2.1 m more room behind you for the same subject size.
Effective Focal Length (Breathing) 56.2 mm (+0.4%) 91.8 mm (+2.0%) Fujifilm XF 56mm F1.2 R WR frames like 56.2 mm (+0.4%) at 3.4 m; Fujifilm XF 90mm F2 R LM WR frames like 91.8 mm (+2.0%) at 5.5 m.
Depth of Field (Sharp Zone) 26 cm (3.30 m – 3.56 m) 43 cm (5.29 m – 5.72 m) The Fujifilm XF 56mm F1.2 R WR has a 40% thinner focus zone (26 cm vs. 43 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 46.7 mm (f/1.2) 45.0 mm (f/2) Nearly identical distant background blur size at equal framing.
Minimum Focus Distance 0.5 m 0.6 m Fujifilm XF 56mm F1.2 R WR focuses 10 cm closer (0.5 m vs. 0.6 m) for tighter close-ups.
Patent Prescription JP2023-029039A (13/8) US20160274335A1 (11/8) Published optical prescriptions traced in the 3D simulator above.

Pytania

Which blurs the background more, Fujifilm XF 56mm F1.2 R WR or Fujifilm XF 90mm F2 R LM WR?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Fujifilm XF 56mm F1.2 R WR at f/1.2 has a 46.7 mm entrance pupil, while Fujifilm XF 90mm F2 R LM WR at f/2 has a 45.0 mm entrance pupil.

How does working distance differ between Fujifilm XF 56mm F1.2 R WR and Fujifilm XF 90mm F2 R LM WR?

For an upper-body portrait, Fujifilm XF 56mm F1.2 R WR stands 3.42 m from the subject (sharp zone 26 cm, from 3.30 m to 3.56 m), whereas Fujifilm XF 90mm F2 R LM WR stands 5.49 m away (sharp zone 43 cm, from 5.29 m to 5.72 m).

How do the optical designs of Fujifilm XF 56mm F1.2 R WR and Fujifilm XF 90mm F2 R LM WR compare?

Fujifilm XF 56mm F1.2 R WR uses 13 elements in 8 groups (JP2023-029039A, effective focal length 56.2 mm at portrait distance). Fujifilm XF 90mm F2 R LM WR uses 11 elements in 8 groups (US20160274335A1, effective focal length 91.8 mm).

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