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| Optical & Portrait Metric | Canon RF 35mm F1.4 L VCM | Canon RF 35mm F1.8 MACRO IS STM | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 1.42 m | 1.42 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Effective Focal Length (Breathing) | 34.7 mm (-0.7%) | 34.8 mm (-0.5%) | At 1.4 m, Canon RF 35mm F1.4 L VCM frames like a 34.7 mm lens while Canon RF 35mm F1.8 MACRO IS STM frames like a 34.8 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.33 m – 1.53 m) | 26 cm (1.30 m – 1.56 m) | The Canon RF 35mm F1.4 L VCM has a 22% thinner focus zone (20 cm vs. 26 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 25.0 mm (f/1.4) | 19.4 mm (f/1.8) | Distant background blur discs are 29% larger on the Canon RF 35mm F1.4 L VCM. |
| Minimum Focus Distance | 0.28 m | 0.17 m | Canon RF 35mm F1.8 MACRO IS STM focuses 11 cm closer (0.28 m vs. 0.17 m) for tighter close-ups. |
| Patent Prescription | JP H11-211978A (11/9) | US20190113711A1 (11/9) | Published optical prescriptions traced in the 3D simulator above. |