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Fujifilm XF 56mm F1.2 R APD vs. Fujifilm XF 56mm F1.2 R WR

Ray-traced side by side from their optical patents at a 3.4 m upper-body portrait distance: compare how the Fujifilm XF 56mm F1.2 R APD (46.7 mm entrance pupil) and Fujifilm XF 56mm F1.2 R WR (46.7 mm entrance pupil) differ in background blur size, edge bokeh, and depth of field.

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Comparaison portrait en un coup d’œil (cadrage buste)

Optical & Portrait Metric Fujifilm XF 56mm F1.2 R APD Fujifilm XF 56mm F1.2 R WR What It Means in Practice
Upper-Body Working Distance 3.42 m 3.42 m Identical working distance—both frame an upper-body portrait from the exact same spot.
Effective Focal Length (Breathing) 56.8 mm (+1.4%) 56.2 mm (+0.4%) At 3.4 m, Fujifilm XF 56mm F1.2 R APD frames like a 56.8 mm lens while Fujifilm XF 56mm F1.2 R WR frames like a 56.2 mm lens.
Depth of Field (Sharp Zone) 26 cm (3.30 m – 3.56 m) 26 cm (3.30 m – 3.56 m) Both lenses deliver the exact same 26 cm sharp focus zone.
Entrance Pupil Diameter 46.7 mm (f/1.2) 46.7 mm (f/1.2) Nearly identical distant background blur size at equal framing.
Minimum Focus Distance 0.7 m 0.5 m Fujifilm XF 56mm F1.2 R WR focuses 20 cm closer (0.7 m vs. 0.5 m) for tighter close-ups.
Patent Prescription US20150212302A1 (11/8) JP2023-029039A (13/8) Published optical prescriptions traced in the 3D simulator above.

Questions

Which blurs the background more, Fujifilm XF 56mm F1.2 R APD 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 56mm F1.2 R APD at f/1.2 has a 46.7 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 56mm F1.2 R APD and Fujifilm XF 56mm F1.2 R WR?

For an upper-body portrait, Fujifilm XF 56mm F1.2 R APD stands 3.42 m from the subject (sharp zone 26 cm, from 3.30 m to 3.56 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 56mm F1.2 R APD and Fujifilm XF 56mm F1.2 R WR compare?

Fujifilm XF 56mm F1.2 R APD uses 11 elements in 8 groups (US20150212302A1, effective focal length 56.8 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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Voir aussi: profondeur de champ, bokeh, facteur de recadrage, compression.