wa·ter·markmark with a watermark.
optical zooms a true zoom feature. It allows you to zoom in (or out) on the subject in the LCD or viewfinder.
Digital zoom is a function of a digital camera used to make the image seem more close-up. Digital zoom on a digital camera works the same as cropping and enlarging a photo in a graphics program.
light meter will include a computer, either digital or analog, which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certainlighting situation and film 
Image stabilization is a family of techniques used to reduce blurring associated with the motion of a camera or other imaging device during exposure.

noise a sound, especially one that is loud or unpleasant or that causes disturbance.

"making a noise like a pig in a trough"

Lag Time noun. the period of time between two closely related events, phenomena, etc., as between stimulus and response or between cause and effect: a time-lag between the declaration of war and full war production. Origin of time-lag Expand.

 hot shoe is a mounting point on the top of a camera to attach a flash unit and other compatible accessories.

fisheye lensis an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image.

 mac·roa single instruction that expands automatically into a set of instructions to perform a particular task

tel·e·pho·to a lens with a longer focal length than standard, giving a narrow field of view and a magnified image.

wide-an·gle(of a lens) having a short focal length and hence a field covering a wide angle.

digital single-lens reflexcamera (also called a digital SLR or DSLR) is a digital camera combining the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.