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Home / Thermal, SWIR & UV lenses / LWIR Thermal lenses
4 mm, F1 LWIR Thermal Lens (LS-SLWIR55)

Thermal, SWIR & UV lenses

4 mm, F1 LWIR Thermal Lens (LS-SLWIR55)

Model LS-SLWIR55

4 mm, F1 LWIR Thermal Lens. Long-wavelength infrared (LWIR) thermal lenses designed for commercial and military applications. At a glance: focal length 4 mm; sensor 384×288 17μm; aperture F1; mount M34×0.5; distortion 29.78%.

$129.00 USDIn stock · 3 available

Inventory updated Oct 14, 2026

0.18 kg shipping weight · Ships in 2-3 weeks
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Specifications

ModelLS-SLWIR55
Focal length4 mm
ApertureF1
Sensor384×288 17μm
Angle of view (deg)110.6°(D)×90.38°(H)×68.74°(V)
Distortion29.78%
Relative illumination0.81
Focus methodFixed
Focus range0.5m~∞
Mechanical back focal length7.5 mm
MountM34×0.5
Dimensionsdia. 38 x L28.8 mm
Operating temperature40℃ to +80℃
Weight<60g
SealingFront IP 67
Front lens coatingHD
Shipping weight (estimated)0.18 kg

Photo shows a representative model of this series; see the specifications for this model.

Applications

  • Commercial
  • Military
Complete the station

Drive the light from a light controller and pair it with a lens for your field of view and working distance.

Light controllers LensesSelection guide

Other sizes in the LWIR Thermal lenses series

ModelSizePriceAvailability
LS-LIR0033-0G2.45 mm, F1, M25x1-mount $109.00 4 in stockView
LS-SLWIRJ52 mm, F1.3 $109.00 4 in stockView
LS-STRLW47L12.1 mm, F1.1 $109.00 2 in stockView
LS-STRLW50L11.8 mm, F1.1 $109.00 2 in stockView
LS-UNNAMEDINTERNALLISTROW73.1 mm, F1.1 $119.00 2 in stockView
LS-SLWIR423.5 mm, F1 $119.00 3 in stockView
LS-STRFA66K5L13.5 mm, F1.0 $119.00 5 in stockView
LS-STRLW49L12.64 mm, F1.1 $119.00 4 in stockView
LS-LIR0061-0H3.7 mm, F1 $129.00 4 in stockView
LS-SLTR38106403.8 mm, F1.0 $129.00 2 in stockView
LS-SLTR44108004.4 mm, F1.0, M45x1-mount $129.00 5 in stockView
LS-SLTR46106404.6 mm, F1.0 $129.00 4 in stockView
LS-SLWIR594 mm, F1 $129.00 5 in stockView
LS-SLWIR643.7 mm, F1.2 $129.00 5 in stockView
LS-SLWIR684 mm, F1.2 $129.00 4 in stockView
LS-SLWIR814.3 mm, F1.2 $129.00 3 in stockView
LS-SLWIRF84.5 mm, F1.2 $129.00 5 in stockView
LS-STRLW28L13.7 mm, F1.1, M9x0.5-mount $129.00 4 in stockView
LS-STRLW41L13.7 mm, F1.1 $129.00 3 in stockView
LS-SLTR55103845.5 mm, F1.0, Flange-mount $139.00 2 in stockView
LS-SLTR56108005.6 mm, F1.0, M45x1-mount $139.00 3 in stockView
LS-SLWIR934.8 mm, F1.2 $139.00 3 in stockView
LS-SLWIRE94.8 mm, F1 $139.00 4 in stockView
LS-SLWIRF95.3 mm, F1.2 $139.00 5 in stockView

See all 194 models in the LWIR Thermal lenses series