Aberration- the influences that cause different rays to coverage to converge to different points.
T-Mount Adapters- a standard lens mount for cameras and other optical assemblies.
Accessory Shoe- (mount point) used for attaching external flash units, viewfinders, spirit levels.
film Plane- the area inside any camera where the frame of the film or digital sensor is located during exposure.
Aperture- a hole/opening where light travels.
Shutter- allows light to pass for a determined period of time.
Exposure- the total amount of light allowed to fall on the photographic medium while taking the photo.
Depth of Field- (DOF) the portion of a scene that appears sharp in the image.
F-stop- expresses the diameter of the entrance pupil.
Focal Lenght- a measure of how strong the system converges or diverges light.
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