类似于Theia的其他镜头，SL183A SL183M和ML183M是高质量的镜头，以允许安装者充分利用高清和多像素相机的高分辨率。镜头可以用在多达五百万像素分辨率的相机上，从边缘到边缘提供清晰的图像。
此外，SL183/ML183系列还包括EasyZoMμ，它允许安装者对镜头进行一次聚焦，然后调整缩放或放大倍数，以获得优化的视场。缩放后只需要小的焦点优化。不需要其他变焦透镜所需的迭代聚焦焦距聚焦方法。
该镜头是红外校正与真实的昼夜相机使用。该IR校正将来自人工照明的IR光聚焦在与可见光相同的平面上，从而允许当白天/夜晚相机切换到夜间模式时图像保持焦点。与没有红外校正的透镜不同，当使用红外照明时，夜间图像不会失去焦点。
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.
