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My guess is that the picture will be taller and larger with increasing distance, and smaller and thinner with decreasing distance. It shouldn't be that sharp when it's very close to the hole ( due to overlapping rays? ),then it will increase its sharpness till a certain point( focal point?) and start to decrease it again (due to far apart rays?) after it.I'm supposing the same exposure time. It would also be interesting to know if increasing exposure time as increasing distance can avoid loosing sharpness.

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I'm studying pinhole cameras and camera obscuras to better understand how light behaves and how pictures are created.

I'm trying to understand how positioning the imaging plane ( I think of it as a paper of light-sensitive material), at different distances from the hole,will affect the picture after the exposure.

I draw what is my intuition for different distances:

(In this case I imagine to use 3 equally large light-sensitive papers for each different distance and then compare the picture obtained)

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A pinhole camera is a camera without a conventional glass lens. An extremely small hole in a thin material can create an image when all light rays from a scene go through a single point. In order to produce a reasonably clear image, the aperture has to be about 1/100th the distance to the screen, or less. The shutter of a pinhole camera usually consists of a hand operated flap of some light-proof material to cover and uncover the pinhole.

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withe balance and shutter speed images
https://padlet.com/adam_malik09101/me7emltvii7g

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Trinidadian Winfred Atwell was born in Tunapuna in Trinidad and Tobago she left Trinidad in the early 1940s    She and her parents lived in Jubilee Street. Her family owned a pharmacy, and she trained as a pharmacist, and was expected to join the family business. Winifred, however, had played the piano from a young age, and achieved considerable popularity locally. She played for American servicemen at the Air Force base (which is now the main airport It was while playing at the Servicemen's Club at Piarco that someone bet her she could not play something in the boogie-woogie style that was popular back home in the United States. She went away and wrote Piarco Boogie which was later renamed "Five Finger Boogie

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During my visit  to Black Cultural Archives was founded in 1981 to collect, preserve and celebrate the contributions Black people have made to the culture, society and heritage of the UK. I realise it was the first museum in UK in represent the black culture and music  in UK.

Their collection was very  unique which includes rare documents, photographs,  oral history testimonies and objects dating from the second century to the present day. Though our public programmes and partnership work with other organisations we enable a variety of communities to learn and connect with this often hidden history.

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Born in Kingston, Forbes was raised on Wildman Street and attended

He began his career as a selector on the Tom the Great Sebastian sound system in the early 1950
After he travel to England in 1954 as a stowaway on a boat from Kingston.
hes first job in uk was as cleaner in engine for british rail company

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the black British  music's of creative independents

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the first digital picture  has been taken by
russell  kirsh in US at the  National Institute of Standards
this picture is One of the first photographs scanned was a picture of Kirsch's son
that is almost 20 years before Kodak’s engineer invented the first digital camera. ...

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appeared above in a snapshot captured by Louis Daguerre. The exposure lasted around seven minutes and was aimed at capturing the Boulevard du Temple, a thoroughfare in Paris, France. Due to the long exposure time, many individuals who walked the street where not in place long enough to make an impression. However, in the lower left of the photograph we can see a man standing and getting his shoe’s polished. Further analysis of the picture later found a few other figures – can you find them?

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John Quincy Adams, the sixth President of the United States, was the first picture taken for a president of US The  shot was in 1843, a good number of years after Adams left office in 1829. The first to have his picture taken in office was James Polk, the 11th President, who was photographed in 1849.

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NASA photographers snapped the first photograph of a Cape Canaveral launch in July of 1950. The rocket being launched was known as the ‘Bumper 2’; it was a two-stage rocket comprising a V-2 missile based and a WAC Corporal rocket. The shot also clearly showcases other photographers lined up and ready to get their images of the event.

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was taken in 1840 by Hippolyte Bayard. Both Bayard and Louis Daguerre fought to claim the title “Father of Photography.” Bayard had supposedly developed his photography process before Daguerre introduced the Daguerreotype. However, the announcement of the invention was held off, and Daguerre claimed the moment. In a rebellious move, Bayard produced this photograph of a drowned man claiming that he killed himself because of the feud.

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The first photograph of our sun was taken by French Physicists Louis Fizeau and Leon Foucault on April 2nd, 1845. The snapshot was captured using the Daguerreotype process (don’t tell Bayard) and resulted after a 1/60 of a second. If you observe the photograph carefully, you can spot several sunspots.

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made in a camera was taken in 1826 by Joseph Nicéphore Niépce. The photograph was taken from the upstair’s windows of Niépce’s estate in the Burgundy region of France. This image was captured via a process known as heliography, which used Bitumen of Judea coated onto a piece of glass or metal; the Bitumen than hardened in proportion to the amount of light that hit it.

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While the photojournalist’s name may have slipped away, his work has not. This photograph taken in 1847 via the Daguerreotype process is thought to be the first ever photograph taken for the news; it depicts a man being arrested in France.

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was taken by the mathematical physicist, James Clerk Maxwell. The piece above is considered the first durable color photograph and was envied by Maxwell at a lecture in 1861. The inventor of the SLR, Thomas Sutton, was the man who pressed the shutter button, but Maxwell is credited with the scientific process that made it possible. For those having trouble identifying the image, it is a three-color bow.

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The history of photography has roots in remote antiquity with the discovery of two critical principles, that of the camera obscura image projection and the fact that some substances are visibly altered by exposure to light, as discovered by observation. Apart from a very uncertain process used on the Turin Shroud there are no artefacts or descriptions that indicate that anyone even imagined capturing images with light sensitive materials before the 18th century. Around 1717 Johann Heinrich Schulze captured cut-out letters on a bottle of a light-sensitive slurry, but he apparently never thought of making the results durable. Around 1800 Thomas Wedgwood made the first reliably documented, although unsuccessful attempt at capturing camera images in permanent form. His experiments did produce detailed photograms, but Wedgwood and his associate Humphry Davy found no way to fix these images

In the mid-1820s, Nicéphore Niépce first managed to fix an image that was captured with a camera, but at least eight hours or even several days of exposure in the camera were required and the earliest results were very crude. Niépce's associate Louis Daguerre went on to develop the daguerreotype process, the first publicly announced and commercially viable photographic process. The daguerreotype required only minutes of exposure in the camera, and produced clear, finely detailed results. The details were introduced as a gift to the world in 1839, a date generally accepted as the birth year of practical photography.[1][2] The metal-based daguerreotype process soon had some competition from the paper-based calotype negative and salt print processes invented by William Henry Fox Talbot. Subsequent innovations made photography easier and more versatile. New materials reduced the required camera exposure time from minutes to seconds, and eventually to a small fraction of a second; new photographic media were more economical, sensitive or convenient, including roll films for casual use by amateurs. In the mid-20th century, developments made it possible for amateurs to take pictures in natural color as well as in black-and-white.

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PHOTOGRAPHY : A CULTURAL HISTORY BY MARY WARNER  MARIEN

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PHOTOGRAPHY : A CULTURAL HISTORY BY MARY WARNER  MARIEN

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the first successful permanent photograph created by Nicéphore Niépce in 1826 or 1827

Niépce was born in Chalon-sur-Saône, Saône-et-Loire, where his father was a wealthy lawyer; this caused the whole family to flee the French Revolution. His older brother Claude (1763–1828) was also his collaborator in research and invention, but died half-mad and destitute in England, having squandered the family wealth in pursuit of non-opportunities for the Pyréolophore. Niepce also had a sister and a younger brother, BernardNicéphore was baptized Joseph but adopted the name Nicéphore, in honour of Saint Nicephorus the ninth-century Patriarch of Constantinople, while studying at the Oratorian college in Angers.[citation needed] At the college he learned science and the experimental method, rapidly achieving success and graduating to work as a professor of the college.

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Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film

Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image, which is later chemically "developed" into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing. A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print, either by using an enlarger or by contact printing.