Visible Spectrum- the range of wavelengths of electromagnetic radiation that is normally visible, from 380 to 760 nm.
Ambrotype- an early type of photograph, made by placing a glass negative against a dark background.
Tintytype- is a photograph made by creating a direct positive on a sheet of iron metal that is blackened by painting, lacquering or enamelling and is used as a support for a collodion photographic emulsion.
Pentaprism- a prism that has five faces, a pair of which are at 90° to each other; a ray entering one of the pair emerges from the other at an angle of 90° to its original direction: used especially in single-lens reflex cameras to reverse images laterally and reflect them to the viewfinder.
Picture of the inside of a SLR camera -
Definitions
aperture- an opening, usually circular, that limits the quantity of light that can enter an optical instrument.
shutter- a mechanical device for opening and closing the aperture of a camera lens to expose film or the like.
exposure- the intensity of light falling on a photographic film or plate multiplied by the time for which it is exposed
depth of field- the range of distances along the axis of an optical instrument, usually a camera lens, through which an object will produce a relatively distinct image.
F-stop- the setting of an adjustable lens aperture, as indicated by an f number.
Focal length- the distance between an object lens and its corresponding focal plane in a telescope.
Labeled buttons on T3 -
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