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Nikon AF DC 135mm f/2D — Simulador de bokeh y ray-tracing óptico
Interactive 3D portrait ray-traced through the published US4908639A optical prescription (7 elements in 6 groups) with a 67.5 mm entrance pupil and 1.1 m minimum focus.
Especificaciones ópticas y de retrato (medio cuerpo)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US4908639A · 7 elements in 6 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 67.5 mm (at f/2) | Controls distant background blur disc size |
| Upper-Body Working Distance | 5.40 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 131.0 mm (-3.0%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 28 cm (5.27 m – 5.55 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 1.1 m | Closest focusing distance from the sensor |
Preguntas
How much background blur does the Nikon AF DC 135mm f/2D produce?
Wide open at f/2, the Nikon AF DC 135mm f/2D has a 67.5 mm entrance pupil (135 mm ÷ 2). In an upper-body portrait at 5.40 m, the sharp depth-of-field zone spans 28 cm (5.27 m to 5.55 m), while mechanical vignetting and 7 glass elements shape the out-of-focus highlights.
Does the Nikon AF DC 135mm f/2D show focus breathing at portrait distance?
Based on patent US4908639A, tracing the focusing group at 5.40 m gives an effective framing focal length of 131.0 mm (-3.0% vs. the nominal 135 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Nikon AF DC 135mm f/2D?
The patent prescription (US4908639A) specifies 7 lens elements in 6 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
Comparaciones directas de patente con Nikon AF DC 135mm f/2D
Comparaciones relacionadas
- Nikon NIKKOR Z 135mm f/1.8 S Plena
- Canon 135mm f/2 L
- Sony FE 135mm F1.8 GM
- Canon RF 135mm F1.8 L IS USM
- Nikon NIKKOR Z 85mm f/1.2 S
- Nikon 105mm f/1.4 FX
Ver también: profundidad de campo, bokeh, factor de recorte, compresión.