Custom, Affordable Video Surveillance Solutions


Call us Toll-Free 1-877-DEALS-79 (1-877-332-5779)

Theia Technologies 1.8-3mm Ultra HD Wide Angle Fish-Eye Low Distortion Auto-Iris Fixed IR-Corrected Megapixel Lens 1/3 CS F1.8 115-degrees 2yr


More Views

Theia Technologies 1.8-3mm Ultra HD Wide Angle Fish-Eye Low Distortion Auto-Iris Fixed IR-Corrected Megapixel Lens 1/3 CS F1.8 115-degrees 2yr SKU: SL183A

In stock

Availability: Ships within 1 business day.

4x Buyer Protection


Theia's SL183 lenses provide ultra wide field of view without distortion. These are varifocal lenses allowing the user to optimize the field of view from wide angle to ultra wide. The lenses incorporate patented Linear Optical Technology® which allows an ultra wide field of view without barrel distortion unlike other wide angle lenses not including Theia's technology. This rectilinear design allows increased resolution at the edges of the image thus increasing the probability of detection.

Similar to Theia's other lenses, the SL183 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.

In addition, the SL183 series includes EasyZoom™ which allows the installer to focus the lens once and then adjust zoom or magnification to give the optimized field of view. Only minor focus optimization is required after zooming. There is no need for the iterative focus-zoom-focus method of setup required for other varifocal lenses.

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 SL183A SL183M
Iris type DC autoiris Manual iris
Focal Length
(field of view)
1.8 - 3.0mm varifocal
using Linear Optical Technology®
IR correction IR corrected for Day/Night cameras
Mount type CS-mount
F/# F/1.8 to closed
Resolution Up to 5 megapixels
Distortion <1% barrel at image edges (for 1/3" sensor)
Minimum focus 0.5m
Pan focus distance 2.0m to ∞
Lens size Ø39mm x 50mm
Lens weight 70g (approx)
Technical specifications Download pdf
Drawing SL183A drawing SL183M drawing
CAD iges file iges (14.4MB)
step (5.7MB)
iges (15.3MB)
step (6.1MB)
Owner's manual Download pdf

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

Autoiris connector

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) 105° - 77° 116° - 89° 115° - 88°
Field of view (V) 90° - 62° 84° - 57° 99° - 71°
Field of view (D) 117° - 90° 123° - 96° 126° - 100°
Additional Information

Additional Information

Model SL183A
Resolution Capability Megapixel, HD
Focal Length No
Iris Auto-Iris
Aperture 1.8
Mount CS Mount
Format Cover 1/3"
Brand Theia Technolgoies
Shipment No
Manufacturer's Suggested Retail Price No