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Sony Hexar 35mm F2 — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published JP H05-164961A optical prescription (7 elements in 6 groups) with a 17.5 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 | JP H05-164961A · 7 elements in 6 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 17.5 mm (at f/2) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 72% at f/2 (≥86% from f/2.8) · -0.7 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 54° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 1.42 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 35.1 mm (+0.2%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 29 cm (1.29 m – 1.58 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 Sony Hexar 35mm F2 produce?
Wide open at f/2, the Sony Hexar 35mm F2 has a 17.5 mm entrance pupil (35 mm ÷ 2) and 72% bokeh roundness in the 90% corner (-0.7 EV corner falloff, reaching ≥86% roundness from f/2.8). In an upper-body portrait at 1.42 m, the sharp depth-of-field zone spans 29 cm (1.29 m to 1.58 m) with a 54° horizontal background angle of view.
Does the Sony Hexar 35mm F2 show focus breathing at portrait distance?
Based on patent JP H05-164961A, tracing the focusing group at 1.42 m gives an effective framing focal length of 35.1 mm (+0.2% 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 Sony Hexar 35mm F2?
The patent prescription (JP H05-164961A) specifies 7 lens elements in 6 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Sony Distagon T* 35mm F1.4
- Sony AF 35mm F2
- Sony Hexanon AR 40mm F1.8
- 24mm vs 35mm focal length comparison
- 28mm vs 35mm focal length comparison
- 35mm vs 40mm focal length comparison
Compare with similar portrait lenses
- Sony FE 35mm F1.8
- Nikon 35mm f/2 AF-D FX
- Nikon 35mm f/2 AI-s
- Canon 35mm f/2 IS
- Sony FE 50mm F2.8 Macro
Also see: depth of field, bokeh, crop factor, lens compression.