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Fujifilm GF 80mm F1.7 R WR vs. Fujifilm GF 110mm F2 R LM WR

Pick the 80mm f/1.7 if you want a wider field of view, pick the 110mm f/2 if you want about 17% more background blur. Compare both side by side.

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Portrait At-a-Glance Comparison (Upper Body Framing)

Optical & Portrait Metric Fujifilm GF 80mm F1.7 R WR Fujifilm GF 110mm F2 R LM WR What It Means in Practice
Upper-Body Working Distance 2.64 m 3.62 m The Fujifilm GF 110mm F2 R LM WR requires 1.0 m more room behind you for the same subject size.
Background Field of View (Compression) 30° 22° Fujifilm GF 110mm F2 R LM WR shows a 27% narrower slice of the room behind the subject (22° vs. 30°), isolating them against a cleaner background.
Entrance Pupil Diameter 47.1 mm (f/1.7) 55.0 mm (f/2) Distant background blur discs are 17% larger on the Fujifilm GF 110mm F2 R LM WR.
Corner Bokeh Roundness (90% Field) 46% (-1.3 EV) 47% (-1.3 EV) Similar corner bokeh shape wide open (46% vs. 47% roundness at 90% field).
Effective Focal Length (Breathing) 82.5 mm (+3.1%) 114.0 mm (+3.7%) Fujifilm GF 80mm F1.7 R WR frames like 82.5 mm (+3.1%) at 2.6 m; Fujifilm GF 110mm F2 R LM WR frames like 114.0 mm (+3.7%) at 3.6 m.
Depth of Field (Sharp Zone) 20 cm (2.55 m – 2.74 m) 23 cm (3.51 m – 3.74 m) The Fujifilm GF 80mm F1.7 R WR has a 15% thinner focus zone (20 cm vs. 23 cm)—requiring more precise eye focus.
Minimum Focus Distance 0.7 m 0.9 m Fujifilm GF 80mm F1.7 R WR focuses 20 cm closer (0.7 m vs. 0.9 m) for tighter close-ups.

Questions

Which blurs the background more, Fujifilm GF 80mm F1.7 R WR or Fujifilm GF 110mm F2 R LM WR?

At the same subject framing, distant background blur scales with the entrance pupil diameter (focal length ÷ f-number). Fujifilm GF 80mm F1.7 R WR at f/1.7 has a 47.1 mm entrance pupil, while Fujifilm GF 110mm F2 R LM WR at f/2 has a 55.0 mm entrance pupil.

How does working distance differ between Fujifilm GF 80mm F1.7 R WR and Fujifilm GF 110mm F2 R LM WR?

For an upper-body portrait, Fujifilm GF 80mm F1.7 R WR stands 2.64 m from the subject (sharp zone 20 cm, from 2.55 m to 2.74 m), whereas Fujifilm GF 110mm F2 R LM WR stands 3.62 m away (sharp zone 23 cm, from 3.51 m to 3.74 m).

How do the optical designs of Fujifilm GF 80mm F1.7 R WR and Fujifilm GF 110mm F2 R LM WR compare?

Fujifilm GF 80mm F1.7 R WR uses 12 elements in 9 groups (US20210294073A1, effective focal length 82.5 mm at portrait distance). Fujifilm GF 110mm F2 R LM WR uses 14 elements in 9 groups (US20180100988A1, effective focal length 114.0 mm).

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Also see: depth of field, bokeh, crop factor, lens compression.