Trova un obiettivo per questo look
I link eBay possono fruttarci una commissione, senza costi aggiuntivi per te.
Obiettivi corrispondenti di ogni marca, più alcuni classici di medio e grande formato. Scrivimi se qualcosa è sbagliato o manca.
Sony Sonnar FE 55mm F1.8 ZA — Simulatore di bokeh e ray-tracing ottico
Interactive 3D portrait ray-traced through the published US20150092100A1 optical prescription (7 elements in 5 groups, 5 aspherical) with a 30.6 mm entrance pupil and 0.5 m minimum focus.
Specifiche ottiche e ritratto (inquadratura mezzo busto)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20150092100A1 · 7 elements in 5 groups (5 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 30.6 mm (at f/1.8) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.21 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 54.2 mm (-1.5%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 26 cm (2.09 m – 2.35 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.5 m | Closest focusing distance from the sensor |
Domande
How much background blur does the Sony Sonnar FE 55mm F1.8 ZA produce?
Wide open at f/1.8, the Sony Sonnar FE 55mm F1.8 ZA has a 30.6 mm entrance pupil (55 mm ÷ 1.8). In an upper-body portrait at 2.21 m, the sharp depth-of-field zone spans 26 cm (2.09 m to 2.35 m), while mechanical vignetting and 7 glass elements shape the out-of-focus highlights.
Does the Sony Sonnar FE 55mm F1.8 ZA show focus breathing at portrait distance?
Based on patent US20150092100A1, tracing the focusing group at 2.21 m gives an effective framing focal length of 54.2 mm (-1.5% vs. the nominal 55 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Sony Sonnar FE 55mm F1.8 ZA?
The patent prescription (US20150092100A1) specifies 7 lens elements in 5 groups with 5 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Confronti diretti da brevetto con Sony Sonnar FE 55mm F1.8 ZA
- Sony Sonnar FE 55mm F1.8 ZA vs. Sony FE 50mm F1.8
- Sony Sonnar FE 55mm F1.8 ZA vs. Sony FE 50mm F1.2 GM
- Sony Sonnar FE 55mm F1.8 ZA vs. Sony Planar FE 50mm F1.4 ZA
Confronti collegati
- Sony FE 50mm F1.8
- Nikon NIKKOR Z 50mm f/1.8 S
- Canon RF 50mm F1.8 STM
- Sony FE 90mm F2.8 Macro G OSS
- Nikon NIKKOR Z 35mm f/1.2 S
Vedi anche: profondità di campo, bokeh, fattore di crop, compressione.