Featuring Aven's versatile Standard Articulating Arm, this system is ideal for covering a large working area and ensures users have maximum flexibility in positioning the microscope. The SPZ-50 microscope offers the best in class zoom ratio (7.46:1) with super sharp 3D images, wide field of view (1.35" to 0.14"), and long working distance (4.25"). The integrated LED Ring Light with Focus Mount with coarse and fine focus. The unit also includes a power supply box with variable dimming control. System Components: SPZ-50 - Stereo Zoom Binocular Microscope, 26800B-560 - Standard Articulating Arm Stand, 26200B-209 - E-Arm Focus Mount with LED Ring Light.