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Leica Summilux-SL 50mm f/1.4 ASPH. — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published EP3136147A1 optical prescription (11 elements in 9 groups, 4 aspherical) with a 35.7 mm entrance pupil and 0.6 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | EP3136147A1 · 11 elements in 9 groups (4 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 35.7 mm (at f/1.4) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.01 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 49.8 mm (-0.5%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 20 cm (1.92 m – 2.12 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.6 m | Closest focusing distance from the sensor |
Questions
How much background blur does the Leica Summilux-SL 50mm f/1.4 ASPH. produce?
Wide open at f/1.4, the Leica Summilux-SL 50mm f/1.4 ASPH. has a 35.7 mm entrance pupil (50 mm ÷ 1.4). In an upper-body portrait at 2.01 m, the sharp depth-of-field zone spans 20 cm (1.92 m to 2.12 m), while mechanical vignetting and 11 glass elements shape the out-of-focus highlights.
Does the Leica Summilux-SL 50mm f/1.4 ASPH. show focus breathing at portrait distance?
Based on patent EP3136147A1, tracing the focusing group at 2.01 m gives an effective framing focal length of 49.8 mm (-0.5% vs. the nominal 50 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Leica Summilux-SL 50mm f/1.4 ASPH.?
The patent prescription (EP3136147A1) specifies 11 lens elements in 9 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 Leica Summilux-SL 50mm f/1.4 ASPH.
Related comparisons
- Sony Planar FE 50mm F1.4 ZA
- Nikon NIKKOR Z 50mm f/1.4
- Nikon AF-S 50mm f/1.4G
- Sony FE 90mm F2.8 Macro G OSS
Also see: depth of field, bokeh, crop factor, lens compression.