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Fujifilm XF 50mm F2 R 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 50mm F2 R WR (3.1 m working distance, 25.0 mm pupil) against the Fujifilm XF 56mm F1.2 R WR (3.4 m working distance, 46.7 mm pupil).

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Comparación de retrato de un vistazo (medio cuerpo)

Optical & Portrait Metric Fujifilm XF 50mm F2 R WR Fujifilm XF 56mm F1.2 R WR What It Means in Practice
Upper-Body Working Distance 3.06 m 3.42 m The Fujifilm XF 56mm F1.2 R WR requires 0.4 m more room behind you for the same subject size.
Effective Focal Length (Breathing) 50.3 mm (+0.5%) 56.2 mm (+0.4%) Fujifilm XF 50mm F2 R WR frames like 50.3 mm (+0.5%) at 3.1 m; Fujifilm XF 56mm F1.2 R WR frames like 56.2 mm (+0.4%) at 3.4 m.
Depth of Field (Sharp Zone) 44 cm (2.86 m – 3.29 m) 26 cm (3.30 m – 3.56 m) The Fujifilm XF 56mm F1.2 R WR has a 40% thinner focus zone (44 cm vs. 26 cm)—requiring more precise eye focus.
Entrance Pupil Diameter 25.0 mm (f/2) 46.7 mm (f/1.2) Distant background blur discs are 87% larger on the Fujifilm XF 56mm F1.2 R WR.
Minimum Focus Distance 0.39 m 0.5 m Fujifilm XF 50mm F2 R WR focuses 11 cm closer (0.39 m vs. 0.5 m) for tighter close-ups.
Patent Prescription US10168507B2 (9/7) JP2023-029039A (13/8) Published optical prescriptions traced in the 3D simulator above.

Preguntas

Which blurs the background more, Fujifilm XF 50mm F2 R 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 50mm F2 R WR at f/2 has a 25.0 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 50mm F2 R WR and Fujifilm XF 56mm F1.2 R WR?

For an upper-body portrait, Fujifilm XF 50mm F2 R WR stands 3.06 m from the subject (sharp zone 44 cm, from 2.86 m to 3.29 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 50mm F2 R WR and Fujifilm XF 56mm F1.2 R WR compare?

Fujifilm XF 50mm F2 R WR uses 9 elements in 7 groups (US10168507B2, effective focal length 50.3 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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Ver también: profundidad de campo, bokeh, factor de recorte, compresión.