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Theia Technologies SL940M 9-40mm, f1.5, Manual-Iris, CS-Mount Lens, IR-Corrected, 5 Megapixel, 2yr warranty


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Theia Technologies SL940M 9-40mm, f1.5, Manual-Iris, CS-Mount Lens, IR-Corrected, 5 Megapixel, 2yr warranty SKU: SL940M

Regular Price: $299.95

Special Price $242.50

In stock

Availability: Ships within 1 business day.

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Theia's SL940 with it's long focal length magnifies objects from far away for unobtrusive security.

Similar to Theia's other lenses, the SL940 is a high quality lens designed to allow the installer to take full advantage of the high resolution of HD and multi megapixel cameras. The lens can be used on cameras up to five megapixel resolution giving a crisp image from edge to edge.

The lens is IR corrected for use with true Day/Night cameras. This IR correction focuses IR light from artificial illumination at the same plane as the visible light allowing the image to remain in focus when the Day/Night camera switches to night mode. Unlike lenses without IR correction, the night image will not be out of focus when using IR illumination.





Lens model SL940A SL940P SL940M
Iris type DC autoiris P-iris Manual iris
Focal Length
(field of view)
9 - 40mm varifocal
IR correction IR corrected for Day/Night cameras
Mount type CS-mount
F/# F/1.5 to closed
Resolution Up to 5 megapixels
Minimum focus 2.5m
Lens size Ø39mm x 50mm
Lens weight 70g (approx)
Technical specifications Download pdf Download pdf Download pdf
Drawing SL940A drawing Same as SL940A SL940M drawing
CAD iges file iges (13.0MB)
step (5.2MB)
Same as SL940A iges (14.3MB)
step (5.8MB)
Owner's manual Download pdf

Only if your camera has a receptical that looks like this can you use an autoiris lens

Autoiris connector

A limited set of cameras are capable of driving a P-iris lens. Call Theia for more information.


Lens Field of view

Sensor Size 1/3" 1/2.7" 1/2.5"
Sensor Diagonal Ø6.0mm Ø6.6mm Ø7.2mm
Sensor Format 4x3 HD (16x9) 4x3
Field of view (H) 30° - 7.1° 37° - 8.6° 36° - 8.5°
Field of view (V) 22° - 5.3° 20° - 4.8° 27° - 6.3°
Field of view (D) 38° - 8.8° 42° - 9.9° 46° - 10.6°
Additional Information

Additional Information

Model SL940M
Resolution Capability Megapixel, HD
Focal Length No
Iris Manual Iris
Aperture No
Mount No
Format Cover No
Brand Theia Technolgoies
Shipment N/A
Manufacturer's Suggested Retail Price No