Canon RF 85mm F1.2 L USM vs. Sony FE 85mm F1.4 GM II

Ray-traced side by side from their optical patents at a 3.4 m upper-body portrait distance: compare how the Canon RF 85mm F1.2 L USM (70.8 mm entrance pupil) and Sony FE 85mm F1.4 GM II (60.7 mm entrance pupil) differ in background blur size, edge bokeh, and depth of field.

Caricamento della scena…

Modello ottico

Focale 50mm

GrandangoloTele

Diaframma f/2.8

Più sfocatoMeno sfocato

Distanza fotocamera 2.0 m

Più vicinoPiù lontano

Sensore 36.0 × 24.0 mm

Diaframma

Inquadratura

Scena

Confronto ritratto a colpo d’occhio (mezzo busto)

Optical & Portrait Metric	Canon RF 85mm F1.2 L USM	Sony FE 85mm F1.4 GM II	What It Means in Practice
Upper-Body Working Distance	3.41 m	3.41 m	Identical working distance—both frame an upper-body portrait from the exact same spot.
Effective Focal Length (Breathing)	88.4 mm (+4.0%)	83.0 mm (-2.4%)	At 3.4 m, Canon RF 85mm F1.2 L USM frames like a 88.4 mm lens while Sony FE 85mm F1.4 GM II frames like a 83.0 mm lens.
Depth of Field (Sharp Zone)	17 cm (3.33 m – 3.49 m)	20 cm (3.31 m – 3.51 m)	The Canon RF 85mm F1.2 L USM has a 14% thinner focus zone (17 cm vs. 20 cm)—requiring more precise eye focus.
Entrance Pupil Diameter	70.8 mm (f/1.2)	60.7 mm (f/1.4)	Distant background blur discs are 17% larger on the Canon RF 85mm F1.2 L USM.
Minimum Focus Distance	0.85 m	0.85 m	Both lenses share the same 0.85 m close-focus limit.
Patent Prescription	US20200012073A1 (14/9)	WO2025239028A1 (14/11)	Published optical prescriptions traced in the 3D simulator above.

Domande

Which blurs the background more, Canon RF 85mm F1.2 L USM or Sony FE 85mm F1.4 GM II?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Canon RF 85mm F1.2 L USM at f/1.2 has a 70.8 mm entrance pupil, while Sony FE 85mm F1.4 GM II at f/1.4 has a 60.7 mm entrance pupil.

How does working distance differ between Canon RF 85mm F1.2 L USM and Sony FE 85mm F1.4 GM II?

For an upper-body portrait, Canon RF 85mm F1.2 L USM stands 3.41 m from the subject (sharp zone 17 cm, from 3.33 m to 3.49 m), whereas Sony FE 85mm F1.4 GM II stands 3.41 m away (sharp zone 20 cm, from 3.31 m to 3.51 m).

How do the optical designs of Canon RF 85mm F1.2 L USM and Sony FE 85mm F1.4 GM II compare?

Canon RF 85mm F1.2 L USM uses 14 elements in 9 groups (US20200012073A1, effective focal length 88.4 mm at portrait distance). Sony FE 85mm F1.4 GM II uses 14 elements in 11 groups (WO2025239028A1, effective focal length 83.0 mm).

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Vedi anche: profondità di campo, bokeh, fattore di crop, compressione.