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Fujifilm GF 80mm F1.7 R WR — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US20210294073A1 optical prescription (12 elements in 9 groups, 2 aspherical) with a 47.1 mm entrance pupil and 0.7 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20210294073A1 · 12 elements in 9 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 47.1 mm (at f/1.7) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.64 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 82.5 mm (+3.1%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 20 cm (2.55 m – 2.74 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.7 m | Closest focusing distance from the sensor |
Questions
How much background blur does the Fujifilm GF 80mm F1.7 R WR produce?
Wide open at f/1.7, the Fujifilm GF 80mm F1.7 R WR has a 47.1 mm entrance pupil (80 mm ÷ 1.7). In an upper-body portrait at 2.64 m, the sharp depth-of-field zone spans 20 cm (2.55 m to 2.74 m), while mechanical vignetting and 12 glass elements shape the out-of-focus highlights.
Does the Fujifilm GF 80mm F1.7 R WR show focus breathing at portrait distance?
Based on patent US20210294073A1, tracing the focusing group at 2.64 m gives an effective framing focal length of 82.5 mm (+3.1% vs. the nominal 80 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm GF 80mm F1.7 R WR?
The patent prescription (US20210294073A1) specifies 12 lens elements in 9 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Head-to-head patent comparisons with Fujifilm GF 80mm F1.7 R WR
- Fujifilm GF 80mm F1.7 R WR vs. Canon RF 50mm F1.2 L USM
- Fujifilm GF 80mm F1.7 R WR vs. Fujifilm GF 110mm F2 R LM WR
- Fujifilm GF 80mm F1.7 R WR vs. Fujifilm GF 55mm F1.7 R WR
Related comparisons
- Sony FE 85mm f/1.8
- Nikon NIKKOR Z 85mm f/1.8 S
- Canon 85mm f/1.8
- Sony FE 85mm F1.4 GM II
- Fujifilm XF 56mm F1.2 R WR
- Fujifilm XF 56mm F1.2 R APD
Also see: depth of field, bokeh, crop factor, lens compression.