Standard prime lenses for L-Mount

8 standard prime options that fit Panasonic Lumix S, Leica SL, and Sigma fp full-frame bodies (the L-Mount Alliance) — the natural field of view — first prime territory. Every spec from the manufacturer's own product name and catalog.

Last verified 2026-09-01

Shooting a specific body? Per-camera fits: Leica SL3 · Panasonic Lumix S1R II · Panasonic Lumix S5 · Panasonic Lumix S5 II · Panasonic Lumix S5 IIX · Panasonic Lumix S9 · Sigma fp L.

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Focal	Lens	Buy	Max aperture	Weight	Filter	Type	Coverage	Best for
17-40mm	Sigma 17-40mm f/1.8 DC Art	See price on Amazon	f/1.8	535 g	67mm	zoom	APS-C	EverydayStandard primeLow-lightPro standard zoom
28-45mm	Sigma 28-45mm f/1.8 DG DN Art	See price on Amazon	f/1.8	960 g	82mm	zoom	Full-frame	Standard primeEverydayLow-lightPro standard zoom
50mm	Leica SL 50mm f/2 APO-Summicron	See price on Amazon	f/2	740 g	—	prime	Full-frame	Standard prime
50mm	Panasonic Lumix S 50mm f/1.8	See price on Amazon	f/1.8	300 g	67mm	prime	Full-frame	Standard primeBudgetLow-light
50mm	Panasonic Lumix S PRO 50mm f/1.4	See price on Amazon	f/1.4	955 g	—	prime	Full-frame	PortraitLow-lightWedding & eventStandard prime
50mm	Sigma 50mm f/1.4 DG DN Art	See price on Amazon	f/1.4	670 g	72mm	prime	Full-frame	PortraitLow-lightStandard primeWedding & event
50mm	Sigma 50mm f/1.2 DG DN Art	See price on Amazon	f/1.2	745 g	72mm	prime	Full-frame	Standard primePortraitLow-light
65mm	Sigma 65mm f/2 DG DN Contemporary	See price on Amazon	f/2	405 g	62mm	prime	Full-frame	Standard primeEverydayPortrait

Weight & weather sealing: which of these can you carry all day?

On long approaches the decision is often made by weight, not aperture. Published weights for 8 of the 8 lenses above:

Lens	Weight	Weather sealing
Panasonic Lumix S 50mm f/1.8	300g	Weather-sealed
Sigma 65mm f/2 DG DN Contemporary	405g	Weather-sealed
Sigma 17-40mm f/1.8 DC Art	535g	Weather-sealed
Sigma 50mm f/1.4 DG DN Art	670g	Weather-sealed
Leica SL 50mm f/2 APO-Summicron	740g	Weather-sealed
Sigma 50mm f/1.2 DG DN Art	745g	Weather-sealed
Panasonic Lumix S PRO 50mm f/1.4	955g	Weather-sealed
Sigma 28-45mm f/1.8 DG DN Art	960g	Weather-sealed

Packing light? The lightest here is the Panasonic Lumix S 50mm f/1.8 at 300g. The lightest weather-sealed option is the Panasonic Lumix S 50mm f/1.8 at 300g — the same lens.

Weights and sealing as published for each lens — 5 from the manufacturer's own spec page, 3 from a published lens database or review quoting the maker's figure (per-lens source recorded in the dataset) · methodology

All L-Mount lenses: the full L-Mount index · other mounts: Sony E · Canon RF · Nikon Z · Fujifilm X · Micro Four Thirds.