A film would be framed and recorded as widescreen, but the picture would be " squashed together " using a specially crafted concave lens to fit into non-widescreen 1.37 : 1 aspect ratio film.
32.
He also described an improved telescope now known as the " astronomical " or " Keplerian telescope " in which two convex lenses can produce higher magnification than Galileo's combination of convex and concave lenses.
33.
This use of light may support speculation among art historians that Vermeer used a mechanical optical device, such as a double concave lens mounted in a camera obscura, to help him achieve realistic light patterns in his paintings.
34.
:If you just mean that the light rays exiting a concave lens can illuminate a piece of paper, that's true, but that's not the same as forming an image .-- talk ) 02 : 27, 20 August 2011 ( UTC)
35.
Zucchi tried looking into the mirror with a hand held concave lens but did not get a satisfactory image, possibly due to the poor quality of the mirror, the angle it was tilted at, or the fact that his head partially obstructed the image.
36.
For a thin lens in air, the focal length is the distance from the center of the concave lens ), the focal length is negative, and is the distance to the point from which a collimated beam appears to be diverging after passing through the lens.
37.
Metius'brother, Jacob Metius, worked as an instrument-maker and a specialist in grinding States General discussed his patent application for an optical telescope of his own invention described as a device for " seeing faraway things as though nearby ", consisting of a convex and concave lens in a tube, and the combination magnified three or four times.
