Samsung SLA-M2890DN Varifocal Lens Dubai Samsung SLA-M2890DN Varifocal Lens Dubai The Samsung SLA-M2890DN Varifocal Lens Dubai CS-mount Lens has a focal length of 2.8 ~ 9mm, and is considered to be used with 1/2.8″, 3Megapixel sensor. The Auto Iris feature generates regular video signals and helps the camera to adjust to moving light levels.