用英语介绍照相机的发明我想写一篇用英语介绍照相机是怎样发明的

用英语介绍照相机的发明我想写一篇用英语介绍照相机是怎样发明的
用英语介绍照相机的发明
我想写一篇用英语介绍照相机是怎样发明的

用英语介绍照相机的发明我想写一篇用英语介绍照相机是怎样发明的
The first permanent photograph was made in 1826 or 1827 by Joseph Nicéphore Niépce using a sliding wooden box camera made by Charles and Vincent Chevalier in Paris.Niépce built on a discovery by Johann Heinrich Schultz (1724):a silver and chalk mixture darkens under exposure to light.While this was the introduction of photography,the history of the camera can be traced back much further.Photographic cameras were a development of the camera obscura,a device dating back to the Book of Optics (1021) of the Iraqi Arab scientist Ibn al-Haytham (Alhacen),[1] which uses a pinhole or lens to project an image of the scene outside onto a viewing surface.Before the invention of photographic lapel processes there was no way to preserve the images produced by these cameras apart from manually tracing them.The earliest cameras were room-sized,with space for one or more people inside; these gradually evolved into more and more compact models such that by Niépce's time portable handheld cameras suitable for photography were readily available.The first camera that was small and portable enough to be practical for photography was built by Johann Zahn in 1685,though it would be almost 150 years before such an application was possible.The arrival of true digital camerasThe first true digital camera that recorded images as a computerized file was likely the Fuji DS-1P of 1988,which recorded to a 16 MB internal memory card that used a battery to keep the data in memory.This camera was never marketed in the United States,and has not been confirmed to have shipped even in Japan.The first commercially available digital camera was the 1990 Dycam Model 1; it also sold as the Logitech Fotoman.It used a CCD image sensor,stored pictures digitally,and connected directly to a PC or Mac for download.[6][7][8]In 1991,Kodak brought to market the Kodak DCS-100,the beginning of a long line of professional SLR cameras by Kodak that were based in part on film bodies,often Nikons.It used a 1.3 megapixel sensor and was priced at $13,000.The move to digital formats was helped by the formation of the first JPEG and MPEG standards in 1988,which allowed image and video files to be compressed for storage.The first consumer camera with a liquid crystal display on the back was the Casio QV-10 in 1995,and the first camera to use CompactFlash was the Kodak DC-25 in 1996.The marketplace for consumer digital cameras was originally low resolution (either analog or digital) cameras built for utility.In 1997 the first megapixel cameras for consumers were marketed.The first camera that offered the ability to record video clips may have been the Ricoh RDC-1 in 1995.1999 saw the introduction of the Nikon D1,a 2.74 megapixel camera that was the first digital SLR developed entirely by a major manufacturer,and at a cost of under $6,000 at introduction was affordable by professional photographers and high end consumers.This camera also used Nikon F-mount lenses,which meant film photographers could use many of the same lenses they already owned.Also in 1999,Minolta introduced the RD-3000 D-SLR at 2.7 megapixels.This camera found many professional adherents.Limitations to the system included the need to use Vectis lenses which were designed for APS size film.The camera was sold with 5 lenses at various focal lengths and ranges (zoom).Minolta did not produce another D-SLR until September 2004 when they introduced the Alpha 7D (Alpha in Japan,Maxxum in North America,Dynax in the rest of the world) but using the Minolta A-mount system from its 35 mm line of cameras.2003 saw the introduction of the Canon EOS 300D,also known as the Digital Rebel,a 6 megapixel camera and the first DSLR priced under $1,000,and marketed to consumers.