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D.Y.K? -- Making the Moon a Star
Most people know how i feel about the Moon. For me it is
one of the most interesting studies in the sky, and a planet in its own right. And i just love studying the Moon through telescopes and photographs. This DYK is about that thing some of you like to do on clear dark nights... Did You Know?... We can all thank a couple of Frenchmen for the invention and development of photography. The first object we can call a photograph was produced in 1822 by the inventor Joseph Nicéphore Niepce (pron. NEE - ps). The process at first wasn't really practical, though. It required an exposure of as long as eight hours. Niepce became bankrupt, and in 1829 went into partnership with the French artist Louis Jacques Mandé Daguerre (pron. da - gair), who was also working on the process. Daguerre improved it to such an extent that he usually is considered the inventor of photography! And How About That DIGITAL Photography. Has anybody invented a truly long-exposure digital camera yet? One that can be used for those looooooong astro shots? Something more than say 5 minutes? Anybody working on it? -- happy days and... starry starry nights! Paine Ellsworth |
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With digital, you dont want too long exposure in fact, they even have
adaptive laser ones that correct for atmosphere at fraction of second. Beauty of digital is that many pictures can easily be added. "Painius" wrote in message ... Most people know how i feel about the Moon. For me it is one of the most interesting studies in the sky, and a planet in its own right. And i just love studying the Moon through telescopes and photographs. This DYK is about that thing some of you like to do on clear dark nights... Did You Know?... We can all thank a couple of Frenchmen for the invention and development of photography. The first object we can call a photograph was produced in 1822 by the inventor Joseph Nicéphore Niepce (pron. NEE - ps). The process at first wasn't really practical, though. It required an exposure of as long as eight hours. Niepce became bankrupt, and in 1829 went into partnership with the French artist Louis Jacques Mandé Daguerre (pron. da - gair), who was also working on the process. Daguerre improved it to such an extent that he usually is considered the inventor of photography! And How About That DIGITAL Photography. Has anybody invented a truly long-exposure digital camera yet? One that can be used for those looooooong astro shots? Something more than say 5 minutes? Anybody working on it? -- happy days and... starry starry nights! Paine Ellsworth |
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"onegod" wrote in message...
... With digital, you dont want too long exposure in fact, they even have adaptive laser ones that correct for atmosphere at fraction of second. Beauty of digital is that many pictures can easily be added. Okay, you lost me here. Say you want to take a picture of a galaxy. With a certain exposure time, you might just get the central hub of the galaxy. Expose a little longer and you get a bit of the spiral near the hub. A longer exposure gets you the whole galaxy. What i'm asking here is has anyone invented a digital camera yet that can expose long enough to get the images you want of dim objects? happy days and... starry starry nights! -- Your heart up hanging on the wall Just dripping tears so painfully, You ne'er felt love so true as mine, I want your heart inside me. Protected from all manner, form And shape of harm it will e'er be, If you say no, I fade and die, I need your heart inside me. Paine Ellsworth |
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"Painius" wrote in message ... Okay, you lost me here. Say you want to take a picture of a galaxy. With a certain exposure time, you might just get the central hub of the galaxy. Expose a little longer and you get a bit of the spiral near the hub. A longer exposure gets you the whole galaxy. What i'm asking here is has anyone invented a digital camera yet that can expose long enough to get the images you want of dim objects? Sure. What's an astronomical CCD other than a specialized digital camera? Just looking around on the internet you will find many images made with astronomical CCD cameras of dim objects, with exposure times of many hours. Some recent consumer digital SLRs (like the Canon EOS 300D) are capable of exposures of up to 10 minutes or even longer. See this site for some excellent examples of what can be done with a modern consumer digital camera: http://panther-observatory.com (follow the "Gallery/deepsky" links) http://velatron.com/dca/gallery/ Most of these have been made with a Canon D60. Jeroen. |
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"Jeroen Smaal" wrote...
in message . nl... "Painius" wrote in message ... Okay, you lost me here. Say you want to take a picture of a galaxy. With a certain exposure time, you might just get the central hub of the galaxy. Expose a little longer and you get a bit of the spiral near the hub. A longer exposure gets you the whole galaxy. What i'm asking here is has anyone invented a digital camera yet that can expose long enough to get the images you want of dim objects? Sure. What's an astronomical CCD other than a specialized digital camera? Just looking around on the internet you will find many images made with astronomical CCD cameras of dim objects, with exposure times of many hours. Some recent consumer digital SLRs (like the Canon EOS 300D) are capable of exposures of up to 10 minutes or even longer. See this site for some excellent examples of what can be done with a modern consumer digital camera: http://panther-observatory.com (follow the "Gallery/deepsky" links) http://velatron.com/dca/gallery/ Most of these have been made with a Canon D60. Jeroen. Thanks, Jeroen! Are these reliable? I have read that many cameras that *say* they do long exposures don't actually deliver the goods. Or after you buy them, you have to figure out a way to make it do long exp.s because the manual for the camera does not make it clear how to do it. happy days and... starry starry nights! -- Your heart up hanging on the wall Just dripping tears so painfully, You ne'er felt love so true as mine, I want your heart inside me. Protected from all manner, form And shape of harm it will e'er be, If you say no, I fade and die, I need your heart inside me. Paine Ellsworth |
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"Painius" wrote in message ... "Jeroen Smaal" wrote... in message . nl... "Painius" wrote in message ... Thanks, Jeroen! Are these reliable? I have read that many cameras that *say* they do long exposures don't actually deliver the goods. Or after you buy them, you have to figure out a way to make it do long exp.s because the manual for the camera does not make it clear how to do it. happy days and... starry starry nights! Hi Paine, I'm very certain these are reliable. These pictures are made with fairly high-end cameras operated by very capable amateur astronomers (this off course is not proof in itself). To get the amount of detail that shows in these pictures, they MUST have done long exposures. With SLRs (either digital or analog) long exposures are usually done with manual timing (i.e. using a cable release to open and close the shutter), so the operator knows exactly how long the shutter has been open. Jeroen. |
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