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Olympus M.Zuiko 45mm f/1.8 vs Panasonic Leica DG 42.5mm f/1.2

Both are Micro Four Thirds mount primes for portrait and low-light — 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

SpecOlympus M.Zuiko 45mm f/1.8Panasonic Leica DG 42.5mm f/1.2
Focal length45mm42.5mm
Max aperturef/1.8f/1.2
Typeprimeprime
CoverageMicro Four ThirdsMicro Four Thirds
MountMicro Four ThirdsMicro Four Thirds

Which should you buy?

Where to buy

OM SYSTEM Olympus M.Zuiko Digital 45mm F1.8 Black for Micro Four Thirds System Camera, Compact Design, Beautiful Bokeh,

Check the Olympus M.Zuiko 45mm f/1.8 price on Amazon →

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Panasonic LUMIX G Leica DG NOCTICRON Lens, 42.5MM, F1.2 ASPH., Professional MIRRORLESS Micro Four Thirds, Power Optical

Check the Panasonic Leica DG 42.5mm f/1.2 price on Amazon →

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FAQ

What's the difference between the Olympus M.Zuiko 45mm f/1.8 and the Panasonic Leica DG 42.5mm f/1.2?
The Olympus M.Zuiko 45mm f/1.8 is 45mm f/1.8 prime, Micro Four Thirds; the Panasonic Leica DG 42.5mm f/1.2 is 42.5mm f/1.2 prime, Micro Four Thirds. Both fit the Micro Four Thirds mount.

Which is better in low light, the Olympus M.Zuiko 45mm f/1.8 or the Panasonic Leica DG 42.5mm f/1.2?
The Panasonic Leica DG 42.5mm f/1.2 — its f/1.2 maximum aperture lets in more light and gives more background blur than the f/1.8 of the other.

Do the Olympus M.Zuiko 45mm f/1.8 and Panasonic Leica DG 42.5mm f/1.2 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.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-21. Copy a ready-made reference:

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 100-400mm f/5-6.3 IS II 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 · OM System M.Zuiko 40-150mm f/2.8 PRO vs OM System M.Zuiko 150-600mm f/5-6.3 IS · all Micro Four Thirds lenses · all comparisons

Olympus M.Zuiko 45mm f/1.8Affiliate linkAmazon →