Water is a polar molecule (H2O)
The Lens is the image-forming device on a camera. The lens bends light rays to project an image onto a light sensitive medium, which may be any of several forms, including film, sensitized glass plate, or electronic sensor.
The Diaphragm is a variable opening which controls the quantity (brightness) of light falling on the light sensitive medium.
The Shutter controls the length of time light is permitted to fall on the light sensitive medium. It can take many forms, but usually has some method for precision adjustment of the time it is open.
Light passing through the lens, aperture, and (when open) the shutter forms an image of specific brightness for a specific duration on the light sensitive medium.
Light also passes through a viewfinder system, which may be a part of the optical system of the camera, or separate from it. In the most complex cameras, some of the light passing through the lens is diverted into a viewfinder by means of a mirror or prism. By using some of the same light passing into the camera, these systems permit the user to see essentially what the camera is seeing.
helllp!/? with that new cingular commerci don't know either! but it sounds like new order or joy division...right?i know the lyrics... I'm the type of guy who likes to or something like that?
Having one lens for the entire range of 28 mm (wide angle) to 105 mm (2x telephoto) means not having to change lenses for both ends of the range. If you do not change lenses, then you save valuable time when taking pictures, and since the camera is does not have to be opened, as when changing lenses, then you do not have to worry about getting dirt and dust in it. The only advantages of having two lenses for the 28-105 mm range would be if they were of better optical quality than the single lens, or had lower f-stop ratings, meaning they were "faster", that is, allowing more light into the camera.
A tripod is a 3 legged metal object that is used to hold object (beakers and stuff) above something (bunsenburner)
it is used by the chemists for performing experiments.