I don't get it. Its long been known that Niépce made his first photos in the 1820s....why is this 'big news'?
Did you read the article?
Niepce did make photographs and there is one image which appears in many books on photography. BUT, the method was impractical as exposure took hours in full sun light and there was no way to make the process faster. It was a photographic dead end.
... Its also known that some of the earliest photos were photos of artwork.
Yes. These plates have been known for a long time. The only thing in the article that was new was that researchers had decided that the plates were unmanipulated photographs, rather than ones that had been retouched manually after processing. People in the thread here on APUG seem to be taking a different understanding of the article, namely that these are previously undiscovered early photos that push back the date of our art form's invention. They're not that. As I said, its been known forever that photography was invented in the 1820s and as Newhall mentions in his history, its believed that photographs were made as early as the 1790s, but they quickly faded because they were done by a process that caused the image to appear from exposure alone (like POP paper), and no means of fixing them had been discovered. Niépce's photos were the earliest ones that were done with a process that produced permanent light-proof images that have survived to the present day.
That's certainly true, but one of the earliest recognized uses of photographs was as an aid to studying art when the person studying it could not actually visit the artwork on location. It really contributed to the study of art history.They were probably good subjects that didn't move around much.
The first fully fixed and permanent image of anything dates from 1819. But as a photograph it is somewhat disappointing.
In that year Sir John Herschel coated a sheet of paper with silver chloride, covered half of it with a card, and exposed the combination to light. The exposed silver went dark as expected but the next step was crucial. Herschel washed the half exposed sheet with a solution of sodium thiosulphate, dissolved the silver chloride, and left the dark deposit of silver immune to further light exposure.
In a sense this half dark half light sheet is a "photograph" of a piece of card. It still exists in the Herschel archive.
Wouldn't that technically be a photogram?
Just jerkin yer chain - If SJH figured out AgX and fixer in 1819, He's alright with me.
There is a dutch collector who found some photograms made by Adriaan Paauw. Those are dated around 1789 and 1790. He used an amoniasolution to fix the images formed on paper with an silverchloride solution. The collector Arjan de Nooy studied his finding for 10 years before publishing it in his book Beyond The Amateur - A collector's
perspective on the history of photography
I couldn't find much on it on the net but here is a link:
http://britishphotohistory.ning.com/profiles/blogs/18thcentury-scientist-adriaan
There are some links in dutch but they tell the same story.
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