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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Jul 2008 18:22:23 IST
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suppose we r taking the picture of a moving object using a camera, then , why do we get a blurred image(compared to when it is stationary)? my doubt is, the moment we click, the image is taken 4 that instant, so y does the camera bother about moving or stationary objects?
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SHREYA |
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6 Jul 2008 19:15:41 IST
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edited
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6 Jul 2008 19:16:54 IST
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i think that the lens of the camera is not able to focus at the moving object as before the image is clicked the lens is focused to an object. when the image is clicked the lens is still focused at the previous object and is not able to focus at the new object which is clicked. thus the image obtained is blurred
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6 Jul 2008 19:17:56 IST
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Then why it doesn't happen with handy cams or video cameras. There also the focus of the lens if fixed but the images don't appear blunt.
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God does not care about our mathematical difficulties. He integrates empirically. ~~~Albert Einstein (1879-1955)~~~~
To divide a cube into two other cubes, a fourth power or in general any power whatever into two powers of the same denomination above the second is impossible, and I have assuredly found an admirable proof of this, but the margin is too narrow to contain it.~~~Pierre de Fermat (1601-1665)~~~
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6 Jul 2008 19:22:15 IST
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that's because the refresh rate of the handycams is very fast.
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6 Jul 2008 19:23:11 IST
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You see, in a film cam, the frame speed might not be greater than the object's. So, the object will leave multiple impressions on the film before the shutter closes.
In digicams too, its about exposure. But, there's no shutter but the exposure time is digitally controlled.
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6 Jul 2008 19:25:01 IST
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So you are trying to tell that if we decrease the refreshing speed or frames/second of the handy cams closer to that of cameras we will get a blunt image?
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God does not care about our mathematical difficulties. He integrates empirically. ~~~Albert Einstein (1879-1955)~~~~
To divide a cube into two other cubes, a fourth power or in general any power whatever into two powers of the same denomination above the second is impossible, and I have assuredly found an admirable proof of this, but the margin is too narrow to contain it.~~~Pierre de Fermat (1601-1665)~~~
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7 Jul 2008 19:58:15 IST
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but i have observed this in videocam itself
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SHREYA |
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@shinee
Then your video cam does not have high enough frame rates.
If you have seen on discovery and national geographic they use high speed cameras (with fram rates > 1000 frames per second!) to observe bullets being shot from a gun.
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