LARGAVISTAS WITH FOCAL DISTANCE MULTIPLIER.

摘要

The Larvists with focal length multiplier, are similar devices to the known ¿Binoculars¿, which have a system of mirrors, located in the corners of some square tubes, which serve to multiply the focal distance that the light that enters through the lens, until focal distances similar to those of the telescopes of the astronomical observatories are achieved, so that it can considerably approach the focused objects, and especially the stars, even though they are, - by their dimensions -, a home object.