Using this Fujinon broadcast camera lens is quite straightforward. Just attach it securely to your compatible camera. When shooting, you can adjust the focal length from 4.5mm to 77mm according to your subject distance and framing needs. The 1:1.6 aperture allows for good light intake, which is great in low - light situations. For maintenance, keep the lens clean by using a soft, lint - free cloth. Avoid touching the lens surface with your fingers as it can leave smudges. Store it in a dry and dust - free place when not in use. If the lens gets dirty, use a proper lens cleaning solution, but be gentle to prevent any damage.