telephotography การใช้

He was the author of a standard book on the subject of telephoto lenses, " Telephotography " ( 1899 ).
Leica also offered focusing systems, such as the Focorapid and Televit, that could replace certain lenses helicoid mounts for sports and natural-life telephotography.
They can be considered the successors of early telephotography input devices, which were able to send consecutive scan lines as press since the 1920s to the mid-1990s.
He says, " At this point it will be sufficient to note that all these formulae involve quantities relating exclusively to the entrance-pupil and its position with respect to the object-point, whereas the focal length of the transforming system does not enter into them . " T . R . Dallmeyer refers to Von Rohr s " interpretation " of depth of field in his 1899 book " Telephotography ".