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DPChallenge Forums >> Hardware and Software >> Why !
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Showing posts 1 - 8 of 8, (reverse)
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 07/23/2007 12:08:41 PM · #1
Why do i always get a black screen when shooting a tv,laptop or a mobile phone ! is there a way to capture what on screen !
 07/23/2007 12:10:18 PM · #2
your shutter speed is to high try a slower shutter speed
 07/23/2007 12:10:26 PM · #3
You have to turn the TV on to get an image on it.
 07/23/2007 12:17:06 PM · #4
Originally posted by electrolost:
your shutter speed is to high try a slower shutter speed


this is very much true. try different speeds. use Tv mode.
 07/23/2007 12:17:51 PM · #5
Originally posted by BHuseman:
You have to turn the TV on to get an image on it.

lol,it is ON..

thanks electrolost,that worked fine,i still have problems understanding shutterspeed..
 07/23/2007 12:25:19 PM · #6
a tv screen has something like 32 images a second I think so ya need no faster than 1/30
 07/23/2007 05:41:48 PM · #7
Originally posted by electrolost:
a tv screen has something like 32 images a second I think so ya need no faster than 1/30


PAL is 25fps
NTSC is 30fps (29.97)

but then it all depends on the refresh rate of the screen, ;)

Message edited by author 2007-07-23 21:42:55.
 07/23/2007 06:15:00 PM · #8
Computer monitors can be set at different rates, but in the US most are 60Hz, which is also the standard screen refresh for a TV. The refresh rate is different than the frame rate. Sometimes you can take a picture and get a black bar across the screen which has to do with that refresh rate. Try setting your shutter to 1/60 and see what happens. Any faster than that and you will see the actual electron gun drawing the image on the screen.
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