Fujifilm XF 35mm F2 R WR — Bokeh & Optical Ray-Tracing Simulator

Interactive 3D portrait ray-traced through the published US20170010441A1 optical prescription (9 elements in 6 groups, 4 aspherical) with a 17.5 mm entrance pupil and 0.35 m minimum focus.

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Optical & Portrait Specifications (Upper Body Framing)

Optical & Portrait Metric	Measured / Patent Value	What It Means in Practice
Patent Prescription	US20170010441A1 · 9 elements in 6 groups (4 aspherical)	Traced surface by surface in WebGL2
Entrance Pupil Diameter	17.5 mm (at f/2)	Controls distant background blur disc size
Upper-Body Working Distance	2.15 m	Camera-to-subject distance for head-to-waist framing
Effective Focal Length (Breathing)	34.7 mm (-0.8%)	Actual framing focal length at portrait distance
Depth of Field (Sharp Zone)	44 cm (1.95 m – 2.39 m)	Sharp zone at wide-open aperture
Minimum Focus Distance	0.35 m	Closest focusing distance from the sensor

Questions

How much background blur does the Fujifilm XF 35mm F2 R WR produce?

Wide open at f/2, the Fujifilm XF 35mm F2 R WR has a 17.5 mm entrance pupil (35 mm ÷ 2). In an upper-body portrait at 2.15 m, the sharp depth-of-field zone spans 44 cm (1.95 m to 2.39 m), while mechanical vignetting and 9 glass elements shape the out-of-focus highlights.

Does the Fujifilm XF 35mm F2 R WR show focus breathing at portrait distance?

Based on patent US20170010441A1, tracing the focusing group at 2.15 m gives an effective framing focal length of 34.7 mm (-0.8% vs. the nominal 35 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.

What optical design is inside the Fujifilm XF 35mm F2 R WR?

The patent prescription (US20170010441A1) specifies 9 lens elements in 6 groups with 4 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.

Head-to-head patent comparisons with Fujifilm XF 35mm F2 R WR

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Also see: depth of field, bokeh, crop factor, lens compression.