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Field of view is the area of the inspection captured on the camera’s imager. The size of the field of view and the size of the camera’s imager directly affect the image resolution (one determining factor in accuracy). Working distance is the distance between the back of the lens and the target object.
The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras, a lens of a given focal length gives a narrower field of view in such cameras.
This means the crop factor for most film-based Hasselblad cameras (based on diagonal angle of view) compared to "full-frame" 135 is 0.54; for example, a V system lens with a focal length of 80 mm would have the equivalent coverage of a lens with a focal length of approximately 45 mm on a 135 film camera.
Angular diameter: the angle subtended by an object. The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is the angular aperture (of a lens).
The f-number N is given by: = where f is the focal length, and D is the diameter of the entrance pupil (effective aperture).It is customary to write f-numbers preceded by "f /", which forms a mathematical expression of the entrance pupil's diameter in terms of f and N. [1]
The Europa Imaging System (EIS) is a visible spectrum wide and narrow angle camera on board the Europa Clipper mission that will map most of Europa at 50 m (160 ft) resolution, and will provide images of selected surface areas at up to 0.5 m resolution.
The focal length of a lens, together with the size of the image sensor or film in the camera, determines the angle of view. A lens is considered to be a "normal lens" in terms of its angle of view on a camera when its focal length is approximately equal to the diagonal dimension of the film format or image sensor format. [4]
[5] [6] The switch is reset to the 1–2.5 m range each time the camera is opened. [5] [6] The camera has a built-in 95 mm (45 mm equivalent [a]) prime lens, with a closest focusing distance of 0.8 m. "The lens is glass, a step up from the plastic lenses you get with all Fujifilm and some Lomography instant cameras."