Manfrotto Panoramic Rotation Platform Full Frame ELD (Extraordinary Low Dispersion) and ELD (Extraordinary Low Dispersion) and SLD (Special Low Dispersion) glass provide excellent correction for all types of aberrations and the superior image quality throughout the entire zoom range Ideal for mounting a camera or a camcorder exactly at the angle you need it The 300N panoramic rotation unit allows the photographer to take sequential constant angle shots around a single axis an essential part of achieving accurate and easy to stitch panoramic compositions The set positions of the 300N give ample choice of rotation angle and so of number of photos needed to complete a 360° pan and cover the most common requests of panoramic photographers depending on the camera lens equipment used