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Theia ml183m ultra wide zoom lens: SL183 / ML183
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Tessia's sl183a sl183m (CS mount) and ml183m (c-seat) lenses provide ultra wide field of view without distortion. These are zoom lenses that allow the user to optimize the field of view from wide angle to ultra wide. Lenses include patented linear optics technology, which allows ultra wide field of view without barrel distortion, unlike other wide-angle lenses that do not include Tessia's technology. This line design allows for increased resolution at the edge of the image, thus increasing the probability of detection.

Specifications for sl183a, sl183m and ml183m lenses

View examples of wide angle images



Theia's SL183 (CS mount) and ML183 (C mount) 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.



Technical specifications for SL183 and ML183 lenses
View the example wide angle images
SL183A ML183A SL183M ML183M
Iris type DC autoiris Manual iris
Focal length 1.8mm - 3mm using Linear Optical Technology?
F/# F/1.8 to closed
Resolution up to 5 megapixel
IR correction Yes
Mount type CS-mount C-mount CS-mount C-mount
Similar to Theia's other lenses, the sl183a, sl183m and ml183m are high quality lenses to allow installers to take full advantage of the high resolution of HD and multi-pixel cameras. The lens can be used on cameras with a resolution of up to five megapixels, providing a clear image from edge to edge.
In addition, the SL183/ML183 series also includes EasyZoM, which allows the installer to focus on the lens once and then adjust zoom or magnification to get the optimized field of view. After zooming, only a small focus optimization is needed. It does not need the iterative focusing method required by other zoom lenses.
The lens is infrared corrected for use with real day and night cameras. The IR correction focuses the IR light from artificial illumination on the same plane as the visible light, thus allowing the image to remain in focus when the day / night camera is switched to night mode. Different from the lens without infrared correction, when infrared illumination is used, the image at night will not lose focus.
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.

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