18–40 Panasonic S-R1840
The Panasonic S-R1840 is a lens for L-Mount that covers 18-40 mm at f/4.5-6.3.
- f/4.5-6.3widest aperture
- 155 gweight
- 22bodies it fits
Bodies it fits
22 bodies- Mounts
APS-C bodies
It mounts. Its maker does not state its coverage, so we don't say whether the picture is cropped.
- Leica CL (Typ 7323)
- Leica T (Typ 701)
- Leica TL
- Leica TL2
- Mounts
Full frame bodies
It mounts. Its maker does not state its coverage, so we don't say whether the picture is cropped.
- Leica SL (Typ 601)
- Leica SL2
- Leica SL2-S
- Leica SL3
- Leica SL3-P
- Leica SL3-S
- Panasonic Lumix S1
- Panasonic Lumix S1 II
- Panasonic Lumix S1H
- Panasonic Lumix S1R
- Panasonic Lumix S1R II
- Panasonic Lumix S5
- Panasonic Lumix S5 II
- Panasonic Lumix S5D
- Panasonic Lumix S5M2X
- Panasonic Lumix S9
- Sigma BF
- Sigma fp
Specifications
- Focal length
- 18-40 mm1
- Widest aperture
- f/4.5-6.31
- Closest focus
- 0.15 m at 18 mm, 0.35 m at 40 mm1
- Maximum magnification
- 0.28x (focal length 21 mm)1
- Stabilization
- No1
- Mount
- L-Mount1
- Weight
- 155 g1
- Length
- 40.9 mm (when the lens barrel is retracted)1
- Diameter
- 67.9 mm1
- Filter thread
- 62 mm1
- Elements
- 81
- Groups
- 71
- Aperture blades
- 71
- Weather sealed
- Yes1
Sources
- Panasonic product specifications, checked Oct 6, 2026
Each value is checked automatically against the source it links, on the date shown. How we build these pages
† The makers' own tables, row by row, with labels in our plain words (translated where the maker's page isn't in English); each row's numbers are checked against the page it links.
Full specifications†
Show all 20 rows
| Full specifications | Panasonic S-R18401 |
|---|---|
| Lens mount type | Leica Camera AG L-Mount |
| Focal length range | 18 mm to 40 mm |
| Lens element configuration | 7 groups, 8 elements: 3 aspherical lenses, 2 ED lenses, 1 UHR lens (The protective glass is not included) |
| Diaphragm blade count | 7 (circular aperture diaphragm) |
| Maximum aperture at wide end | F4.5 (Wide) |
| Maximum aperture at tele end | F6.3 (Tele) |
| Minimum aperture at wide end | F22 (Wide) |
| Minimum aperture at tele end | F32 (Tele) |
| Angle of view at wide end | 100° (Wide) |
| Angle of view at tele end | 57° (Tele) |
| Minimum focusing distance at wide end | 0.15 m (0.49 feet) (Wide to focal length 21 mm) |
| Minimum focusing distance at tele end | 0.35 m (1.15 feet) (Tele) |
| Maximum image magnification | 0.28× (focal length 21 mm) |
| Optical image stabilizer availability | No |
| Filter diameter | 62 mm |
| Maximum diameter | 67.9 mm (2.67 in) |
| Lens mass | Approx. 155 g (0.34 lb) |
| Dust and splash resistance | Yes |
| Recommended operating temperature range | -10°C to 40°C (14°F to 104°F) |
| Permissible relative humidity range | 10% RH to 80% RH |