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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SL183A
Lens Calculator Lens Selector Request a Sample Request a Quote CAD Downloads

Overview

Selected:
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.

CAD Data

Accessories

KIT-9083

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Part KIT-9083 Thumbscrew replacement kit for:

The kit includes 4x M2x5 set screws, 2x M2x5 button head screw and Allen keys.

Lenses

Theia-ML183M-Transparent

ML183A

1.8–3mm varifocal, ultra wide, no distortion, 5+ MPX, Day/Night, 1/2.3” format, DC auto iris, C mount
Theia-ML183M-Transparent

ML183M

1.8–3mm varifocal, ultra wide, no distortion, 5+ MPX, Day/Night, 1/2.3” format, Manual iris, C mount
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Selected: SL183A

1.8–3mm varifocal, ultra wide, no distortion, 5+ MPX, Day/Night, 1/2.3” format, DC Auto-iris, CS mount
Theia-SL183M-ultra-wide-angle-no-distortion-4k-compatible-varifocal-lens.jpg

SL183M

1.8–3mm varifocal, ultra wide, no distortion, 5+ MPX, Day/Night, 1/2.3” format, Manual iris, CS mount