L-Mount Lenses
61 interactive lens diagrams
Leica L mount and L-Mount Alliance mirrorless system | Full-frame and APS-C mirrorless
The L mount began as Leica's mirrorless mount in the T/TL APS-C system and became a full-frame platform with Leica SL before the L-Mount Alliance opened the standard to Panasonic, Sigma, and later partners. Its 51.6 mm diameter and 20 mm register are meant to support both full-frame and APS-C bodies, with TL-format lenses and SL/full-frame lenses sharing the same physical bayonet.
That shared geometry gives lens designers the short register expected of modern mirrorless systems while leaving room for robust bayonet construction. It also makes the mount unusually mixed in character: Leica SL lenses, Panasonic Lumix S lenses, Sigma DG DN lenses, cinema-oriented bodies, and adapted M lenses can all sit within the same family. Full-frame bodies can crop for APS-C L lenses, while APS-C bodies use full-frame L lenses with the expected narrower angle of view.
In catalog terms, L-mount pages often show how different manufacturers interpret the same full-frame mirrorless standard with very different priorities. Some formulas chase compactness or video practicality, while others lean into maximum correction and large-aperture performance. The mount is therefore useful for comparing optical design choices that come from brand philosophy rather than from incompatible mechanical geometry.
Mount interface
Flange focal distance 20 mm, bayonet mount. 0° at 12 o'clock from the camera front; the lens-side view is the horizontal mirror. Dotted strokes mark photo-scaled or schematic (not-to-scale) dimensions.
Throat / openingMount ringBayonet lug / slotLock pin / notchIndex markElectrical contactScrews / sealsDatum & axis
LAOWA 100mm f/2.8 Tilt-Shift 1× Macro— 13 ELEMENTS / 10 GROUPS, DESIGN f = 101.99 mm, DESIGN F/2.87LAOWA 12mm f/2.8 Zero-D— 16 elements / 10 groups, Design f = 12.4999 mm, Design Fno = 2.87LAOWA 15mm f/2 Zero-D— Patent Example 1, 12 elements / 9 groups, f = 15.505 mm designLAOWA 180mm f/4.5 1.5× Ultra Macro APO— 12 ELEMENTS / 9 GROUPS, DESIGN f = 174.92 mm, DESIGN F/4.6LAOWA 24mm f/14 2× Macro Probe— 27 ELEMENTS / 19 GROUPS, f ≈ 23.7 mm, F/14LAOWA 55mm f/2.8 Tilt-Shift 1× Macro— 14 ELEMENTS / 11 GROUPS, DESIGN f = 55.02 mm, DESIGN F/2.87LAOWA 58mm f/2.8 2× Ultra Macro APO— 14 ELEMENTS / 11 GROUPS, f ≈ 59.2 mm, F/2.9LAOWA 65mm f/2.8 2× Ultra Macro APO— 14 ELEMENTS / 10 GROUPS, f ≈ 66.0 mm (design) / 65 mm (marketed), F/2.9 (design) / F/2.8 (marketed)LAOWA 90mm f/2.8 2× Ultra Macro APO— 13 ELEMENTS / 10 GROUPS, DESIGN f = 87.06 mm, DESIGN F/2.9LEICA APO-MACRO-ELMARIT-TL 60mm f/2.8 ASPH.— 10 ELEMENTS / 9 GROUPS, f ≈ 60.0 mm, F/2.8LEICA APO-VARIO-ELMARIT-SL 90-280mm f/2.8-4— 23 ELEMENTS / 7 GROUPS (17 SUB-GROUPS), f = 92.3–272.9 mm, F/2.91–4.11LEICA ELMARIT-TL 18mm f/2.8 ASPH.— 8 GLASS ELEMENTS / 6 GROUPS, f = 18.4556 mm design, F/2.904 design (f/2.8 nominal)LEICA SUMMICRON-SL 50mm f/2 ASPH.— 9 ELEMENTS / 8 GROUPS, DESIGN f = 48.25 mm, DESIGN F/1.86LEICA SUMMILUX-SL 50mm f/1.4 ASPH. I— 11 ELEMENTS / 9 GROUPS, f ≈ 51.963 mm (DESIGN), F/1.440 (MODELED)LEICA SUMMILUX-TL 35mm f/1.4 ASPH.— 12 ELEMENTS / 8 GROUPS, DESIGN EFL 34.43 mm, MODELED f/1.446LEICA SUPER-VARIO-ELMAR-SL 16-35mm f/3.5-4.5 ASPH.— 18 ELEMENTS / 12 GROUPS, 16-35mm marketed; 16.399-34.194mm computed design EFL, f/3.5-4.5 marketed; f/3.55-4.60 modeledLEICA SUPER-VARIO-ELMAR-TL 11-23mm f/3.5-4.5 ASPH.— 14 ELEMENTS / 11 GROUPS, MODEL EFL ≈ 11.308-22.366 mm, F/3.6-4.61PANASONIC LUMIX S 14-28mm f/4-5.6 MACRO— 14 ELEMENTS / 10 GROUPS, DESIGN f = 14.56–26.93 mm, DESIGN F/4.14–5.68PANASONIC LUMIX S 20-60mm f/3.5-5.6— 11 ELEMENTS / 9 GROUPS, f = 20.8–57.6 mm, F/3.57–5.81PANASONIC LUMIX S 24-105mm f/4 MACRO O.I.S.— 16 ELEMENTS / 13 GROUPS, DESIGN f = 25.003-100.569 mm, MODELED F/4.119PANASONIC LUMIX S 26mm f/8— 5 ELEMENTS / 5 GROUPS, DESIGN f = 24.72 mm, DESIGN F/7.96PANASONIC LUMIX S 35mm f/1.8— 11 ELEMENTS / 9 GROUPS, f ≈ 33.8 mm, F/1.8PANASONIC LUMIX S 70-300mm f/4.5-5.6 MACRO O.I.S.— 17 ELEMENTS / 11 GROUPS, 7 ZOOM GROUPS (+/−/+/+/−/+/−), ALL SPHERICALPANASONIC LUMIX S PRO 16-35mm f/4— 12 LENS ELEMENTS / 9 GROUPS, 16.5534-33.8782 mm DESIGN, F/4.10925-F/4.12028 MODELEDPANASONIC LUMIX S PRO 24-70mm f/2.8— 18 ELEMENTS / 16 GROUPS, DESIGN 24.840-67.551 mm, F/2.927 MODELEDPANASONIC LUMIX S PRO 50mm f/1.4— 13 ELEMENTS / 11 GROUPS, f ≈ 49.0 mm, F/1.4PANASONIC LUMIX S PRO 70-200mm f/2.8 O.I.S.— 22 ELEMENTS / 17 GROUPS, MODELED f = 72.46–193.02 mm, MODELED F/2.83263 WIDEPANASONIC LUMIX S PRO 70-200mm f/4 O.I.S.— 23 ELEMENTS / 17 GROUPS, DESIGN f = 72.50-193.95 mm, MODELED F/4.11-4.15SAMYANG AF 35-150mm f/2-2.8 FE / L— 21 physical elements / 18 groups, Patent EFL 35.989-146.969 mm, Marketed f/2-2.8; patent F2.07-F2.90SIGMA 10-18mm f/2.8 DC DN | Contemporary— 13 elements / 10 groups, 10.30-17.50 mm design EFL, F2.8 marketed; F2.92 patentSIGMA 100-400mm f/5-6.3 DG DN OS | Contemporary— 22 ELEMENTS / 16 GROUPS, DESIGN f = 103.00–387.40 mm, DESIGN F/5.15–6.50SIGMA 105mm f/1.4 DG HSM | Art— 17 elements / 12 groups, f = 101.85 mm design, F1.46 design / f/1.4 nominalSIGMA 105mm f/2.8 DG DN MACRO | Art— 17 ELEMENTS / 12 GROUPS, DESIGN f = 103.48 mm, DESIGN F/2.90SIGMA 135mm f/1.4 DG | Art— 17 ELEMENTS / 13 GROUPS, DESIGN f = 131.00 mm, DESIGN F/1.46SIGMA 14-24mm f/2.8 DG DN | Art— 18 ELEMENTS / 13 GROUPS, DESIGN f = 14.50–23.15 mm, DESIGN F/2.93SIGMA 15mm f/1.4 DG DN DIAGONAL FISHEYE | Art— 21 ELEMENTS / 15 GROUPS, DESIGN f = 15.50 mm, DESIGN F/1.46SIGMA 16mm f/1.4 DC DN | Contemporary— 16 elements / 13 groups, f = 16.446 mm design; 16 mm marketed, F/1.46 design; F1.4 marketedSIGMA 17-40mm f/1.8 DC | Art— 17 elements / 11 groups, 4 SLD / 4 aspherical elements, f = 17.55–38.70 mm designSIGMA 200mm f/2 DG OS | Sports— 19 ELEMENTS / 14 GROUPS, DESIGN f = 194.30 mm, DESIGN F/2.07SIGMA 20mm f/1.4 DG HSM | Art— 15 elements / 11 groups, Patent f = 20.69 mm, Patent F1.46; marketed F1.4SIGMA 23mm f/1.4 DC DN | Contemporary— 13 elements / 10 groups, f = 22.31 mm design; 23 mm marketed, F1.46 design; F1.4 marketedSIGMA 24mm f/1.4 DG DN | Art— 17 elements / 14 groups, f = 23.86 mm patent / 24 mm nominal, F1.46 design / F1.4 nominalSIGMA 24mm f/2 DG DN | Contemporary— 13 ELEMENTS / 11 GROUPS, DESIGN f = 24.00 mm, DESIGN F/2.07SIGMA 24mm f/3.5 DG DN | Contemporary— 10 ELEMENTS / 8 GROUPS, DESIGN f = 24.00 mm, DESIGN F/3.62SIGMA 28-105mm f/2.8 DG DN Art— 18 ELEMENTS / 13 GROUPS, SOURCE 28.55–102.37 mm, SOURCE F2.91SIGMA 28-45mm f/1.8 DG DN | Art— 18 elements / 15 groups, 28.84-43.66 mm design EFL, F1.8 marketed; F1.86 patent designSIGMA 28mm f/1.4 DG HSM | Art— 17 ELEMENTS / 12 GROUPS, DESIGN f = 28.72 mm, DESIGN F/1.46SIGMA 35mm f/1.2 DG II | Art— 17 ELEMENTS / 13 GROUPS, DESIGN f = 34.60 mm, DESIGN F/1.24SIGMA 35mm f/1.4 DG DN | Art— 15 ELEMENTS / 11 GROUPS, f ≈ 33.72 mm (35 mm marketed), F/1.4SIGMA 35mm f/1.4 DG HSM | Art— 13 elements / 11 groups, f = 35.16 mm design, F1.45 design / F1.4 marketedSIGMA 40mm f/1.4 DG HSM | Art— 16 ELEMENTS / 12 GROUPS, f ≈ 41.2 mm, F/1.4SIGMA 45mm f/2.8 DG DN | Contemporary— 8 elements / 7 groups, f = 43.93 mm design / 45 mm marketed, F2.90 design / F2.8 marketedSIGMA 50mm f/1.2 DG DN | Art— 17 ELEMENTS / 12 GROUPS, DESIGN f = 48.27 mm, DESIGN F/1.24SIGMA 50mm f/1.4 DG DN | Art— 14 ELEMENTS / 11 GROUPS, f = 48.72 mm, F/1.45SIGMA 50mm f/1.4 DG HSM | Art— 13 elements / 8 groups, f = 49.58 mm design, F1.4 nominal / F1.46 designSIGMA 60-600mm f/4.5-6.3 DG DN OS | Sports— 27 ELEMENTS / 19 GROUPS, DESIGN f = 62.00–580.00 mm, DESIGN F/4.64–6.50SIGMA 65mm f/2 DG DN | Contemporary— 12 ELEMENTS / 9 GROUPS, DESIGN f = 63.10 mm, DESIGN F/2.07SIGMA 70-200mm f/2.8 DG DN OS | Sports— 20 ELEMENTS / 15 GROUPS, DESIGN f = 72.10–194.00 mm, DESIGN F/2.91SIGMA 85mm f/1.2 DG | Art— 17 ELEMENTS / 12 GROUPS, DESIGN f = 82.63 mm, DESIGN F/1.24SIGMA 85mm f/1.4 DG DN | Art— 15 ELEMENTS / 11 GROUPS, f ≈ 82.96 mm (design), F/1.4 (F/1.46 design)SIGMA 90mm f/2.8 DG DN | Contemporary— 11 ELEMENTS / 10 GROUPS, DESIGN f = 87.30 mm, DESIGN F/2.90