Best low-light lenses for the Leica SL3
14 low-light lenses that fit the Leica SL3 (L-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 Sigma 50mm f/1.2 DG DN Art. At f/1.2 it is the brightest of the 14 low-light L-Mount lenses that fit the Leica SL3 — the full comparison is below.
Check the Sigma 50mm f/1.2 DG DN Art price on Amazon →
One limit of this table: it lists only L-Mount lenses that mount natively on the Leica SL3 — lenses fitted through an adapter are not included here. See which mounts adapt to which.
Weight & weather sealing on the Leica SL3
On long approaches the decision is often made by weight, not aperture. Published weights for 12 of the 14 lenses above (the other 2 have no verified weight in our dataset yet — omitted, never estimated):
| Lens | Weight | Weather sealing |
|---|---|---|
| Panasonic Lumix S 35mm f/1.8 | 295g | Weather-sealed |
| Panasonic Lumix S 50mm f/1.8 | 300g | Weather-sealed |
| Panasonic Lumix S 18mm f/1.8 | 340g | Weather-sealed (dust- and splash-resistant, rated to -10 °C (Panasonic)) |
| Panasonic Lumix S 85mm f/1.8 | 355g | Weather-sealed |
| Sigma 24mm f/1.4 DG DN Art | 520g | Weather-sealed |
| Sigma 35mm F1.4 DG II Art | 530g | Not verified (Source announcement states "The figures are for L-Mount" and carries no dust/splash claim, so sealing is left unverified and no Sony E weight is recorded.) |
| Sigma 85mm f/1.4 DG DN Art | 630g | Weather-sealed |
| Sigma 35mm f/1.4 DG DN Art | 645g | Weather-sealed |
| Sigma 50mm f/1.4 DG DN Art | 670g | 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 35mm f/1.8 at 295g. The lightest weather-sealed option is the Panasonic Lumix S 35mm f/1.8 at 295g — the same lens.
Complete the kit for the Leica SL3
- The Sigma 50mm f/1.2 DG DN Art takes 72mm front filters. One 72mm set (polariser, ND) also fits every other 72mm lens you add later — see which ones. 72mm filters on Amazon →
- The Leica SL3 takes a BP-SCL6 battery (UHS-II (recommended), UHS-I, SD/SDHC/SDXC card + CFexpress card type B (recommended)) — a spare battery and the right card class are body-specific, not lens-specific. BP-SCL6 battery on Amazon →
FAQ
What is the best low-light lens for the Leica SL3?
Sigma 50mm f/1.2 DG DN Art (50mm f/1.2) is the standout low-light option that fits the Leica SL3. 14 low-light L-Mount lenses fit in total — compare them below.
Do these low-light lenses fit the Leica SL3?
Yes — every lens here is a L-Mount lens, so it fits the Leica SL3 and covers its full-frame sensor.
What is the lightest low-light lens for the Leica SL3?
The Panasonic Lumix S 35mm f/1.8 at 295g (manufacturer-published weight). The lightest weather-sealed option is the Panasonic Lumix S 35mm f/1.8 at 295g — the same lens. Weights for 12 of the 14 lenses on this page are in the weight table above.
Already own the Leica SL3, shopping for a spare or an upgrade? Leica SL3 on Amazon →
All lenses for the Leica SL3 · the same use across mounts: Low-light lenses for L-Mount · all cameras