Digital and movie cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Digital and movie cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device. ### Response: .