Ultra Wide, No Distortion Varifocal Lens: SL183/ML183

Ultra wide, no barrel or fisheye distortion
Uses patented Linear Optical Technology®
1.8-3mm focal range, up to 116 degrees HFOV
5+ megapixel resolution
Near IR corrected - for multi-spectral and Day/Night
Slip ring for convenient orientation & positioning
EasyZoom™ requires minimal re-focus post zooming
For 1/2.3" sensor sizes or smaller

ML183M Case Study

Video Playlist of Theia's SL/ML183 Lens:
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Overview

	SL183A	ML183A	SL183M	ML183M
Iris type	DC autoiris	DC autoiris	Manual iris	Manual iris
Focal length	1.8 - 3.0mm	1.8 - 3.0mm	1.8 - 3.0mm	1.8 - 3.0mm
F/#	F/1.8	F/1.8	F/1.8	F/1.8
Resolution	5MP	5MP	5MP	5MP
IR correction	Yes	Yes	Yes	Yes
Mount type	CS-mount	C-mount	CS-mount	C-mount
Lens Length to Mount	49.3 mm	44.3 mm	49.3 mm	44.3 mm
Lens Length (TTL)	61.8 mm	61.8 mm	61.8 mm	61.8 mm

Similar to Theia's other lenses, the SL183 and ML183 are high quality lenses 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/ML183 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.