Aperture: A gap or hole in the lens the limits the amount of light that enters the optical instrument

Dept of feild: is the amount of distance between the nearest and farthest objects that appear in acceptably sharp focus in a photograph. A preferred selection Depth of field ("DOF") in a focused subject in an image can be quite subjective

Darkroom: is a room that is used  to create the film, handled, or developed and from which the actinic rays of light are excluded.

Developer: The person the deveopes and improves the images that where taken.

Enlargement: Process of blowing up and printing a digital picture reproduction on a large format printer.

F-stop: is the setting of the adjustable aperture lens, as indicated by an f number.

Fixer:  is a mix of chemicals used in the final step in the photo processing of film or paper. It stabilises the image, removing the unexposed silver halide remaining on the film, leaving behind the reduced metallic silver that forms the image, making it insensitive to light.

ISO:  is the film speed, it's the measure of a film's sensitivity to light, determined by sensitometry and measured on various numerical scales.

Panning: refers to the rotation in a horizontal plane of a still camera or video camera. Panning a camera results in a motion similar to that of someone shaking their head "no" or of an aircraft performing a yaw rotation.

Single-lens reflex camera(SLR): is a term associated with digital camers. SLR cameras use a mirror between the lens and the film, or image sensor, to provide a focus screen. This means the image you see in the LCD screen will be the same as what appears on film or as your digital image.

Stop Bath: is a chemical bath usually used in processing traditional black & white photos, plates, and paper used after the material has finished developing. The purpose of the stop bath is to stop the development of the film by either washing off the developing chemical or neutralizing it.

Telephoto lens:  is a specific type of a lonf-focus lens in which the physical length of the lens is shorter than the focal length.

View Camera: is a type of camera first developed in the 1840s-'50s and still in use today, after many refinements.

Viewfinder camera: is a device on a camera, consisting of a lens system and sometimes a ground-glass screen, enabling the user to see what will be included in his photograph Sometimes shortened to finder


Zoom lens: is a lens assembly whose focal length can be continuously adjusted to provide various degrees of magnification without any loss of focus, combining the features of wide-angle, normal, and telephoto lenses.


Continuous tone photography: image is one where each color at any point in the image is reproduced as a single tone, and not as discrete halftones, such as one single color for monochromatic prints, or a combination of halftones for color prints


Lens: glass for changing the convergence of light rays, used in eyeglasses, telescopes, etc.


Telephoto lens: lens constructed so as to produce a relatively large image with a focal length shorter than that required by an ordinary lens producing an image of the same size: used to photograph small or distant objects


Wide angle lens: is a lens system on a camera that can cover an angle of view of 60° or more and therefore has a fairly small focal length See also fisheye lens


Shutter: a mechanical device that limits the passage of light. Especially on a camera component that allows light to enter by opening and closing an aperture