Best low-light lenses for the OM System OM-1 Mark II

OM System OM-1 Mark II · 2024 · 20.4 MP Micro Four Thirds · 599 g · in-body stabilisation

9 low-light lenses that fit the OM System OM-1 Mark II (Micro Four Thirds mount) — fast apertures (f/1.8 and brighter) for dim conditions. Sorted brightest-aperture first; every spec from the manufacturer's catalog.

Start with the Panasonic Leica DG 42.5mm f/1.2. At f/1.2 it is the brightest of the 9 low-light Micro Four Thirds lenses that fit the OM System OM-1 Mark II — the full comparison is below.

Last verified 2026-06-21 · Micro Four Thirds mount · OM System Micro Four Thirds body · 2× crop factor

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

Focal	Lens	Buy	Max aperture	Weight	Filter	Type	Coverage	Best for
42.5mm	Panasonic Leica DG 42.5mm f/1.2	Check price →	f/1.2	425 g	67mm	prime	M4/3	PortraitLow-lightWedding & event
20mm	OM System M.Zuiko 20mm f/1.4 PRO	Check price →	f/1.4	247 g	58mm	prime	M4/3	Standard primeEverydayLow-light
25mm	Panasonic Leica DG 25mm f/1.4 II	Check price →	f/1.4	205 g	46mm	prime	M4/3	Standard primeLow-light
10-25mm	Panasonic Leica DG 10-25mm f/1.7	Check price →	f/1.7	690 g	77mm	zoom	M4/3	Pro standard zoomWide-angleLow-lightAstrophotography
15mm	Panasonic Leica DG 15mm f/1.7	Check price →	f/1.7	115 g	46mm	prime	M4/3	StreetEverydayLow-light
42.5mm	Panasonic Lumix G 42.5mm f/1.7 ASPH Power OIS	Check price →	f/1.7	130 g	—	prime	M4/3	PortraitLow-lightBudget
17mm	OM System M.Zuiko 17mm f/1.8	Check price →	f/1.8	120 g	46mm	prime	M4/3	StreetEverydayLow-light
45mm	Olympus M.Zuiko 45mm f/1.8	Check price →	f/1.8	116 g	—	prime	M4/3	PortraitBudgetLow-light
75mm	OM System M.Zuiko 75mm f/1.8	Check price →	f/1.8	305 g	58mm	prime	M4/3	PortraitTelephotoLow-light

One limit of this table: it lists only Micro Four Thirds lenses that mount natively on the OM System OM-1 Mark II — lenses fitted through an adapter are not included here. See which mounts adapt to which.

What these focal lengths actually give you on the OM System OM-1 Mark II

The OM System OM-1 Mark II has a Micro Four Thirds sensor, so it sees a 2× crop of what each lens projects. Every focal length below therefore frames 2× tighter than its marked number. A 50mm on the OM System OM-1 Mark II frames like 100mm, not the "normal" view its marked number implies.

Effective focal lengths are the marked focal length × the 2× sensor crop factor — the field of view, not a change in the lens itself. Aperture and depth of field are unaffected.

Weight & weather sealing on the OM System OM-1 Mark II

On long approaches the decision is often made by weight, not aperture. Published weights for 9 of the 9 lenses above:

Packing light? The lightest here is the Panasonic Leica DG 15mm f/1.7 at 115g. The lightest weather-sealed option is the OM System M.Zuiko 20mm f/1.4 PRO at 247g.

Weights and sealing as published for each lens — 5 from the manufacturer's own spec page, 4 from a published lens database or review quoting the maker's figure (per-lens source recorded in the dataset) · methodology

FAQ

What is the best low-light lens for the OM System OM-1 Mark II?
Panasonic Leica DG 42.5mm f/1.2 (42.5mm f/1.2) is the standout low-light option that fits the OM System OM-1 Mark II. 9 low-light Micro Four Thirds lenses fit in total — compare them below.

Do these low-light lenses fit the OM System OM-1 Mark II?
Yes — every lens here is a Micro Four Thirds mount lens, so it fits the OM System OM-1 Mark II and covers its Micro Four Thirds sensor.

What is the lightest low-light lens for the OM System OM-1 Mark II?
The Panasonic Leica DG 15mm f/1.7 at 115g (manufacturer-published weight). The lightest weather-sealed option is the OM System M.Zuiko 20mm f/1.4 PRO at 247g. Weights for 9 of the 9 lenses on this page are in the weight table above.

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All lenses for the OM System OM-1 Mark II · the same use across mounts: Low-light lenses for Micro Four Thirds · all cameras

Panasonic Leica DG 42.5mm f/1.2Affiliate linkAmazon →