Fujifilm XF 33mm F1.4 R LM WR vs. Fujifilm XF 56mm F1.2 R WR

Ray-traced side by side from their optical patents for the same upper-body portrait framing: compare the Fujifilm XF 33mm F1.4 R LM WR (2.0 m working distance, 23.6 mm pupil) against the Fujifilm XF 56mm F1.2 R WR (3.4 m working distance, 46.7 mm pupil).

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Optical & Portrait Metric Fujifilm XF 33mm F1.4 R LM WR Fujifilm XF 56mm F1.2 R WR What It Means in Practice
Upper-Body Working Distance 2.03 m 3.42 m The Fujifilm XF 56mm F1.2 R WR requires 1.4 m more room behind you for the same subject size.
Effective Focal Length (Breathing) 30.6 mm (-7.4%) 56.2 mm (+0.4%) Fujifilm XF 33mm F1.4 R LM WR frames like 30.6 mm (-7.4%) at 2.0 m; Fujifilm XF 56mm F1.2 R WR frames like 56.2 mm (+0.4%) at 3.4 m.
Depth of Field (Sharp Zone) 31 cm (1.89 m – 2.19 m) 26 cm (3.30 m – 3.56 m) The Fujifilm XF 56mm F1.2 R WR has a 15% thinner focus zone (31 cm vs. 26 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 23.6 mm (f/1.4) 46.7 mm (f/1.2) Distant background blur discs are 98% larger on the Fujifilm XF 56mm F1.2 R WR.
Minimum Focus Distance 0.3 m 0.5 m Fujifilm XF 33mm F1.4 R LM WR focuses 20 cm closer (0.3 m vs. 0.5 m) for tighter close-ups.
Patent Prescription US20220276464A1 (15/10) JP2023-029039A (13/8) Published optical prescriptions traced in the 3D simulator above.

Vragen

Which blurs the background more, Fujifilm XF 33mm F1.4 R LM WR or Fujifilm XF 56mm F1.2 R WR?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Fujifilm XF 33mm F1.4 R LM WR at f/1.4 has a 23.6 mm entrance pupil, while Fujifilm XF 56mm F1.2 R WR at f/1.2 has a 46.7 mm entrance pupil.

How does working distance differ between Fujifilm XF 33mm F1.4 R LM WR and Fujifilm XF 56mm F1.2 R WR?

For an upper-body portrait, Fujifilm XF 33mm F1.4 R LM WR stands 2.03 m from the subject (sharp zone 31 cm, from 1.89 m to 2.19 m), whereas Fujifilm XF 56mm F1.2 R WR stands 3.42 m away (sharp zone 26 cm, from 3.30 m to 3.56 m).

How do the optical designs of Fujifilm XF 33mm F1.4 R LM WR and Fujifilm XF 56mm F1.2 R WR compare?

Fujifilm XF 33mm F1.4 R LM WR uses 15 elements in 10 groups (US20220276464A1, effective focal length 30.6 mm at portrait distance). Fujifilm XF 56mm F1.2 R WR uses 13 elements in 8 groups (JP2023-029039A, effective focal length 56.2 mm).

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