Panasonic Lumix G 20mm f/1.7 II vs OM System M.Zuiko 17mm f/1.8

Both are Micro Four Thirds mount primes for everyday and street — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-06-21 · Micro Four Thirds mount · prices change — check the retailer

Spec	Panasonic Lumix G 20mm f/1.7 II	OM System M.Zuiko 17mm f/1.8
Focal length	20mm	17mm
Max aperture	f/1.7	f/1.8
Type	prime	prime
Coverage	Micro Four Thirds	Micro Four Thirds
Mount	Micro Four Thirds	Micro Four Thirds

Which should you buy?

• the Panasonic Lumix G 20mm f/1.7 II opens wider (f/1.7) — brighter in low light and more background blur
• the OM System M.Zuiko 17mm f/1.8 (17mm) is wider — more in the frame for street and interiors; the Panasonic Lumix G 20mm f/1.7 II (20mm) is tighter — more reach and compression for portraits
• the OM System M.Zuiko 17mm f/1.8 covers Micro Four Thirds (also works on APS-C bodies); the Panasonic Lumix G 20mm f/1.7 II is Micro Four Thirds-only — it won't fill a full-frame sensor

Where to buy

Check the Panasonic Lumix G 20mm f/1.7 II price on Amazon →

Check the OM System M.Zuiko 17mm f/1.8 price on Amazon →

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FAQ

What's the difference between the Panasonic Lumix G 20mm f/1.7 II and the OM System M.Zuiko 17mm f/1.8?
The Panasonic Lumix G 20mm f/1.7 II is 20mm f/1.7 prime, Micro Four Thirds; the OM System M.Zuiko 17mm f/1.8 is 17mm f/1.8 prime, Micro Four Thirds. Both fit the Micro Four Thirds mount.

Which is better in low light, the Panasonic Lumix G 20mm f/1.7 II or the OM System M.Zuiko 17mm f/1.8?
The Panasonic Lumix G 20mm f/1.7 II — its f/1.7 maximum aperture lets in more light and gives more background blur than the f/1.8 of the other.

Do the Panasonic Lumix G 20mm f/1.7 II and OM System M.Zuiko 17mm f/1.8 fit the same camera?
Yes — both are Micro Four Thirds mount lenses, so they fit OM System (Olympus) and Panasonic Lumix G Micro Four Thirds bodies. Note the Panasonic Lumix G 20mm f/1.7 II is Micro Four Thirds-only and won't fill a full-frame sensor.

More Micro Four Thirds comparisons: OM System M.Zuiko 100-400mm f/5-6.3 IS vs Panasonic Lumix G 100-300mm f/4-5.6 II · OM System M.Zuiko 17mm f/1.8 vs Panasonic Leica DG 15mm f/1.7 · Olympus M.Zuiko 45mm f/1.8 vs OM System M.Zuiko 75mm f/1.8 · Panasonic Lumix G 20mm f/1.7 II vs Panasonic Leica DG 15mm f/1.7 · all Micro Four Thirds lenses · all comparisons