Comparaison portrait en un coup d’œil (cadrage buste)
| Optical & Portrait Metric | Canon RF 50mm F1.4 L VCM | Canon RF 50mm F1.8 STM | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 2.01 m | 2.01 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Effective Focal Length (Breathing) | 49.3 mm (-1.5%) | 51.4 mm (+2.8%) | At 2.0 m, Canon RF 50mm F1.4 L VCM frames like a 49.3 mm lens while Canon RF 50mm F1.8 STM frames like a 51.4 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.92 m – 2.12 m) | 26 cm (1.89 m – 2.15 m) | The Canon RF 50mm F1.4 L VCM has a 22% thinner focus zone (20 cm vs. 26 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 35.7 mm (f/1.4) | 27.8 mm (f/1.8) | Distant background blur discs are 28% larger on the Canon RF 50mm F1.4 L VCM. |
| Minimum Focus Distance | 0.4 m | 0.3 m | Canon RF 50mm F1.8 STM focuses 10 cm closer (0.4 m vs. 0.3 m) for tighter close-ups. |
| Patent Prescription | US20250251576A1 (15/11) | US20210263286A1 (6/5) | Published optical prescriptions traced in the 3D simulator above. |