A digital camera is used to take photos. Digital cameras use an image sensor instead of photographic film. Very often, they also use a memory card or a flash drive to store the photos in a digital format.Most modern digital cameras and media players use memory cards and flash drives memory for storage.
A flash drive is a small electronic device containing flash memory that is used for storing data or transferring it to or from a computer, digital camera, etc.
Pentaprism is a five sided prism with two silvered surfaces giving a non-stop deviation of all rays of light through 90 degress. Used in viewfinders of single-lens reflex cameras