How to use Camera-obscura in a sentence
Quite recently, the camera obscura has come into use with submarine vessels, the periscope being simply a camera obscura under a new name.
The increasing importance of the camera obscura as a photographic instrument makes it desirable to bring together what is known of its early history, which is far more extensive than is usually recognized.
On the strength of similar arrangements of lenses and mirrors the invention of the camera obscura has also been claimed for Leonard Digges, the author of Pantometria (1571), who is said to have constructed a telescope from information given in a book of Bacon's experiments.
The first practical step towards the development of the camera obscura seems to have been made by the famous painter and architect, Leon Battista Alberti, in 1437, contemporaneously with the invention of printing.
The first published account of the simple camera obscura was discovered by Libri in a translation of the Architecture of v.Advertisement
It is interesting to note this early employment of the camera obscura in the field of astronomical research, in which its latest achievements have been of such pre-eminent value.
That Barbaro was really the first to apply the lens to the camera obscura is supported by Marius Bettinus in his Apiaria (1645), and by Kaspar Schott in his Magia Universalis (1657), the former taunting Porta with the appropriation.
Risner, who died in 1580, also in his Opticae (1606) very clearly explained the reversal of the images of the simple camera obscura.
In the Diversarum Speculationum Mathematicarum et Physicarum (1585), by the Venetian Giovanni Battista Benedetti, there is a letter in which he discusses the simple camera obscura and mentions the improvement some one had made in it by the use of a double convex lens in the aperture; he also says that the images could be made erect by reflection from any plane mirror.
In this the description of the camera obscura is in lib.Advertisement
Though Porta's merits were undoubtedly great, he did not invent or improve the camera obscura.
The first to take up the camera obscura after Porta was Kepler, who used it in the old way for solar observations in 1600, and in his Ad Vitellionem Paralipomena (1604) discusses the early problems of the passages of light through small apertures, and the rationale of the simple dark chamber.
The earliest mention of the camera obscura in England is probably in Francis Bacon's De Augmentis Scientiarum, but it is only as an illustration of the projected images showing better on a white screen than on a black one.
Most of the writers already noticed worked out the problems connected with the projection of images in the camera obscura more by actual practice than by calculation, but William Molyneux, of Dublin, seems to have been the first to treat them mathematically in his Dioptrica Nova (1692), which was also the first work in English on the subject, and is otherwise an interesting book.
Sir Isaac Newton, in his Opticks (1704), explains the principle of the camera obscura with single convex lens and its analogy with vision in illustration of his seventh axiom, which aptly embodies the correct solution of Aristotle's old problem.Advertisement
He also made great use of the simple dark chamber for his optical experiments with prisms, &c. Joseph Priestley (1772) mentions the application of the solar microscope, both to the small and portable and the large camera obscura.
The camera obscura was first applied to photography (q.v.) probably about 1794, by Thomas Wedgwood.
The advantages claimed for it were its cheapness, smallness and portability; that there was no appreciable distortion, and that its field was much larger than that of the camera obscura.
To prevent this overlapping of images, and yet to admit a good deal of light, is one main object of the lens which usually forms part of the camera obscura.
These two facets of his work have led several experts to believe that the artist used a camera obscura - Philip Steadman among them.Advertisement
The museum also houses an 1836 camera obscura which gives panoramic views of the town and surrounding area.
Bridge dating from 15th century is oldest of five across River Nith, and 18th-century windmill contains camera obscura and local history museum.
Are you interested in learning how to make camera obscura?
Ever since camera obscura was created in the 19th century, people worldwide have been using the device for everything from astrophysics to photography.
Keep reading to find out how you can make camera obscura quickly in your very own home!Advertisement
A camera obscura is a simple device that allows light into a box.
A camera obscura can be made out of everyday objects such as a soda can, a Pringles chips container, a coffee can, a metal box or anything similar.
While one can make camera obscura from other materials, it is easier to use metals.
If you're using a soda or chip can, any excess moisture or grease will catch the light and destroy your camera obscura.
If you'd like to turn your camera obscura into a pinhole camera, you can do so with ease.
Remove the tissue paper and place this piece of paper inside so that each of the three sides of the paper touch three of the walls of the camera obscura.
A camera obscura made at home will never produce as vivid of images as a larger, professionally built one.
You have gone ahead and made your very own camera obscura.
If you're feeling crafty, you can use your camera obscura to create a drawing.
When you have made your camera obscura a pinhole camera, set it close to that piece of paper you've previously taped.
Create experimental photographs using your camera obscura.