18 mm, F1 LWIR thermal lens
LS-SWL-0021
- Focal length 18 mm
- Mount M25x0.5
- Sensor 1/1.2"
$399.00
Ships in 2-3 weeks
Lenses
LWIR thermal imaging lenses
Lenses for the 8 to 14 µm bandLong-wave infrared lenses for thermal cameras and uncooled detector cores. Compare focal length, F-number, detector format, mount and back focal length.
Products
17 mm LWIR thermal lens
LS-SWL-0153
- Focal length 17x eyepiece
- Mount M24x8
- Sensor 1/1.56"
$389.00
Ships in 2-3 weeks
17 mm, F1.2 LWIR thermal lens
LS-SWL-0006
- Focal length 17 mm
- Sensor 1/1.2"
- Aperture F1.2
$389.00
Ships in 2-3 weeks
16 mm, F1.0, M45x1-mount LWIR thermal lens
LS-SWL-0187
- Focal length 16 mm
- Mount M45x1
- Sensor 1.1"
$369.00
Ships in 2-3 weeks
16 mm, F1 LWIR thermal lens
LS-SWL-0181
- Focal length 16 mm
- Mount M26x0.5
- Sensor 1"
$369.00
Ships in 2-3 weeks
16 mm, F1.0 LWIR thermal lens
LS-SWL-0170
- Focal length 16 mm
- Mount M34x0.75
- Sensor 1.1"
$369.00
Ships in 2-3 weeks
15 mm, F1 LWIR thermal lens, BFL 8.95 mm
LS-SWL-0147
- Focal length 15 mm
- Mount M45x1.0
- Sensor 1/1.2"
$359.00
Ships in 2-3 weeks
15 mm, F1 LWIR thermal lens, BFL 7.5 mm
LS-SWL-0139
- Focal length 15 mm
- Mount M45x1.0
- Sensor 1/2"
$359.00
Ships in 2-3 weeks
15 mm, F1.0 LWIR thermal lens
LS-SWL-0137
- Focal length 15 mm
- Mount M20x0.5
- Sensor 1/2"
$359.00
Ships in 2-3 weeks
15 mm, F1, Flange-mount LWIR thermal lens
LS-SWL-0133
- Focal length 15 mm
- Mount Flange mount
- Sensor 1/3.2"
$359.00
Ships in 2-3 weeks
15 mm, F1 LWIR thermal lens, BFL 4 mm
LS-SWL-0077
- Focal length 15 mm
- Mount M14x0.5
- Sensor 1/5.6"
$359.00
Ships in 2-3 weeks
14 mm, F1, M45x1-mount LWIR thermal lens
LS-SWL-0051
- Focal length 14 mm
- Mount M45x1
- Sensor 1.1"
$339.00
Ships in 2-3 weeks
14 mm, F1.2 LWIR thermal lens
LS-SWL-0005
- Focal length 14 mm
- Sensor 1/1.2"
- Aperture F1.2
$339.00
Ships in 2-3 weeks
14 mm LWIR thermal lens
LS-SWL-0001
- Focal length 14x eyepiece
- Mount M35x0.75
- Sensor 1/1.56"
$339.00
Ships in 2-3 weeks
13 mm, F1 LWIR thermal lens, BFL 9.5 mm, dia. 38 x L37 mm
LS-SWL-0182
- Focal length 13 mm
- Mount M34x0.5
- Sensor 1/1.2"
$329.00
Ships in 2-3 weeks
13 mm, F1 LWIR thermal lens, BFL 4.2 mm, dia. 20.4 x L16.8 mm
LS-SWL-0177
- Focal length 13 mm
- Mount M17x0.75
- Sensor 1/2"
$329.00
Ships in 2-3 weeks
13 mm, F1 LWIR thermal lens, BFL 4.2 mm, dia. 20.4 x L16.8 mm
LS-SWL-0176
- Focal length 13 mm
- Mount M17x0.75
- Sensor 1/2"
$329.00
Ships in 2-3 weeks
13 mm, F1.1 LWIR thermal lens
LS-SWL-0162
- Focal length 13 mm
- Mount M17x0.75
- Sensor 1/2"
$329.00
Ships in 2-3 weeks
13 mm, F1.1 LWIR thermal lens
LS-SWL-0161
- Focal length 13 mm
- Mount M17x0.75
- Sensor 1/2"
$329.00
Ships in 2-3 weeks
13 mm, F1.0 LWIR thermal lens
LS-SWL-0158
- Focal length 13 mm
- Sensor 1/2"
- Aperture F1.0
$329.00
Ships in 2-3 weeks
13 mm, F0.9 LWIR thermal lens, BFL 7.43 mm
LS-SWL-0134
- Focal length 13 mm
- Mount M31x0.75
- Sensor 1/3.2"
$329.00
Ships in 2-3 weeks
13.5 mm, F1.1 LWIR thermal lens
LS-SWL-0120
- Focal length 13.5 mm
- Mount M22x0.5
- Sensor 1/1.7"
$339.00
Ships in 2-3 weeks
13 mm, F1.2 LWIR thermal lens, BFL 8.5 mm
LS-SWL-0110
- Focal length 13 mm
- Mount M20x0.5
- Sensor 1/1.7"
$329.00
Ships in 2-3 weeks
13 mm, F1.2 LWIR thermal lens, BFL 7.5 mm
LS-SWL-0103
- Focal length 13 mm
- Mount M17x0.5
- Sensor 1/1.7"
$329.00
Ships in 2-3 weeks
| Compare | ||||||||
|---|---|---|---|---|---|---|---|---|
 LS-SWL-002118 mm, F1 LWIR thermal lens
| 18 mm | M25x0.5 | 1/1.2" | F1 | - | $399.00 | Ships in 2-3 weeks | |
 LS-SWL-015317 mm LWIR thermal lens
| 17x eyepiece | M24x8 | 1/1.56" | - | Thermal (LWIR) | $389.00 | Ships in 2-3 weeks | |
 LS-SWL-000617 mm, F1.2 LWIR thermal lens
| 17 mm | - | 1/1.2" | F1.2 | Thermal (LWIR) | $389.00 | Ships in 2-3 weeks | |
 LS-SWL-018716 mm, F1.0, M45x1-mount LWIR thermal lens
| 16 mm | M45x1 | 1.1" | F1.0 | - | $369.00 | Ships in 2-3 weeks | |
 LS-SWL-018116 mm, F1 LWIR thermal lens
| 16 mm | M26x0.5 | 1" | F1 | - | $369.00 | Ships in 2-3 weeks | |
|
LS-SWL-017016 mm, F1.0 LWIR thermal lens
| 16 mm | M34x0.75 | 1.1" | F1.0 | - | $369.00 | Ships in 2-3 weeks | |
 LS-SWL-014715 mm, F1 LWIR thermal lens, BFL 8.95 mm
| 15 mm | M45x1.0 | 1/1.2" | F1 | - | $359.00 | Ships in 2-3 weeks | |
 LS-SWL-013915 mm, F1 LWIR thermal lens, BFL 7.5 mm
| 15 mm | M45x1.0 | 1/2" | F1 | - | $359.00 | Ships in 2-3 weeks | |
 LS-SWL-013715 mm, F1.0 LWIR thermal lens
| 15 mm | M20x0.5 | 1/2" | F1.0 | - | $359.00 | Ships in 2-3 weeks | |
 LS-SWL-013315 mm, F1, Flange-mount LWIR thermal lens
| 15 mm | Flange mount | 1/3.2" | F1 | - | $359.00 | Ships in 2-3 weeks | |
 LS-SWL-007715 mm, F1 LWIR thermal lens, BFL 4 mm
| 15 mm | M14x0.5 | 1/5.6" | F1 | - | $359.00 | Ships in 2-3 weeks | |
 LS-SWL-005114 mm, F1, M45x1-mount LWIR thermal lens
| 14 mm | M45x1 | 1.1" | F1 | - | $339.00 | Ships in 2-3 weeks | |
|
LS-SWL-000514 mm, F1.2 LWIR thermal lens
| 14 mm | - | 1/1.2" | F1.2 | Thermal (LWIR) | $339.00 | Ships in 2-3 weeks | |
 LS-SWL-000114 mm LWIR thermal lens
| 14x eyepiece | M35x0.75 | 1/1.56" | - | Thermal (LWIR) | $339.00 | Ships in 2-3 weeks | |
 LS-SWL-018213 mm, F1 LWIR thermal lens, BFL 9.5 mm, dia. 38 x L37 mm
| 13 mm | M34x0.5 | 1/1.2" | F1 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-017713 mm, F1 LWIR thermal lens, BFL 4.2 mm, dia. 20.4 x L16.8 mm
| 13 mm | M17x0.75 | 1/2" | F1 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-017613 mm, F1 LWIR thermal lens, BFL 4.2 mm, dia. 20.4 x L16.8 mm
| 13 mm | M17x0.75 | 1/2" | F1 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-016213 mm, F1.1 LWIR thermal lens
| 13 mm | M17x0.75 | 1/2" | F1.1 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-016113 mm, F1.1 LWIR thermal lens
| 13 mm | M17x0.75 | 1/2" | F1.1 | - | $329.00 | Ships in 2-3 weeks | |
|
LS-SWL-015813 mm, F1.0 LWIR thermal lens
| 13 mm | - | 1/2" | F1.0 | Thermal (LWIR) | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-013413 mm, F0.9 LWIR thermal lens, BFL 7.43 mm
| 13 mm | M31x0.75 | 1/3.2" | F0.9 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-012013.5 mm, F1.1 LWIR thermal lens
| 13.5 mm | M22x0.5 | 1/1.7" | F1.1 | - | $339.00 | Ships in 2-3 weeks | |
 LS-SWL-011013 mm, F1.2 LWIR thermal lens, BFL 8.5 mm
| 13 mm | M20x0.5 | 1/1.7" | F1.2 | - | $329.00 | Ships in 2-3 weeks | |
 LS-SWL-010313 mm, F1.2 LWIR thermal lens, BFL 7.5 mm
| 13 mm | M17x0.5 | 1/1.7" | F1.2 | - | $329.00 | Ships in 2-3 weeks |
Lenses for the 8 to 14 µm band
Thermal imaging in the long-wave infrared uses wavelengths of roughly 8 to 14 µm, which optical glass does not transmit, so these lenses are made from infrared materials. Uncooled detectors need a lot of energy, which is why thermal lenses have low F-numbers, and the lens is matched to the detector by its pixel pitch and pixel count.
- Calculate the detector size from pixel count and pixel pitch and compare it with the format the lens covers.
- Choose the focal length from the field of view; compare the F-number, since a lower one gives the detector more signal.
- Check the mount thread and the back focal length against the camera core, and whether the model is fixed focus, manual focus or athermalised.