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Fujifilm GF 30mm F5.6 T/S — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published WO2024195273A1 optical prescription (16 elements in 11 groups, 6 aspherical) with a 5.4 mm entrance pupil and 0.3 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | WO2024195273A1 · 16 elements in 11 groups (6 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 5.4 mm (at f/5.6) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 100% at f/5.6 · -0.5 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 71° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 1.02 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 30.4 mm (+1.4%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 76 cm (76 cm – 1.52 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.3 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm GF 30mm F5.6 T/S produce?
Wide open at f/5.6, the Fujifilm GF 30mm F5.6 T/S has a 5.4 mm entrance pupil (30 mm ÷ 5.6) and 100% bokeh roundness in the 90% corner (-0.5 EV corner falloff). In an upper-body portrait at 1.02 m, the sharp depth-of-field zone spans 76 cm (76 cm to 1.52 m) with a 71° horizontal background angle of view.
Does the Fujifilm GF 30mm F5.6 T/S show focus breathing at portrait distance?
Based on patent WO2024195273A1, tracing the focusing group at 1.02 m gives an effective framing focal length of 30.4 mm (+1.4% vs. the nominal 30 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm GF 30mm F5.6 T/S?
The patent prescription (WO2024195273A1) specifies 16 lens elements in 11 groups with 6 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Fujifilm GF 30mm F3.5 R WR
- Fujifilm GF 23mm F4 R LM WR
- 28mm vs 35mm focal length comparison
- 28mm vs 50mm focal length comparison
- 33mm APS-C vs 50mm full frame focal length comparison
- 24mm vs 35mm focal length comparison
Compare with similar portrait lenses
- Sony E 30mm F3.5 Macro
- Nikon 28mm f/3.5
- Fujifilm XF 30mm F2.8 R LM WR Macro
- Nikon NIKKOR Z 28mm f/2.8
Also see: depth of field, bokeh, crop factor, lens compression.