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12/10/2002 12:34:45 AM · #1 |
| I'm talking about an 8 second exposure here, what would happen if you switched the light off halfway through the photo, my guess is that the light would dominate the photo, but i'm not sure. |
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12/10/2002 04:03:50 AM · #2 |
That depends on how you set up your exposure and how strong that light will be. When it is pretty dark and you use F11, 8s ISO 50 you can get a reasonable picture because you are underexposing like mad. As long as the light you turn on isn't to strong. I think that it needs some experimenting with the time you put your light on and what settings you will need.
But when you let the camera determine the exposure and it gives no exposure warning, you will get an overexposed picture. What I mean is: you need to underexpose deliberately.
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12/10/2002 04:34:57 AM · #3 |
Originally posted by achiral:
I'm talking about an 8 second exposure here, what would happen if you switched the light off halfway through the photo, my guess is that the light would dominate the photo, but i'm not sure. |
This would mean 4 of the 8 seconds are fully lit, so either it'll be incredibly over-exposed, or you'd have had to take in as little light as possible (as Azrifel suggests) that you wouldn't pick up much from beforehand.
My advice would be to use a flash (or even multiple flashes, if possible / desired) during the exposure, a technique I used on my current motion shot to get an object clearly in view but still with the light from the rest of the exposure visible.
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12/10/2002 08:13:49 AM · #4 |
switching a light off partway through the exposure is a good way to get some illumination in a part of the scene you're photographing without having hot spots in your picture.
We had to shoot the inside of a church for school with 4X5 view cameras and if you wanted some lights on to even out the exposure you had to have someone with you to turn them off partway during the exposure. It's quite a nice effect if you can pull it off |
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12/10/2002 11:59:42 AM · #5 |
Originally posted by achiral:
I'm talking about an 8 second exposure here, what would happen if you switched the light off halfway through the photo, my guess is that the light would dominate the photo, but i'm not sure. |
If there are no other lights at all (a totally dark room for example) then it would look just like a 4 second exposure.
Something I tried last night (after scab-lab showed us how its done) was 'painting with light' Using a long exposure and a torch to light the scene you can get some quite interesting results. You play the light over the object and 'paint' in which bits you want to see.
My best attempt
i've seen some amazing shots done using this technique. Best thing is just to play around and see how you get on.
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12/10/2002 03:17:05 PM · #6 |
Long exposure's with different types of light is fun too. Fluorescent lights will show a soft pulse. Neon lights will flash 60 cycles per second , LED will also.. you can write or draw with light , try spelling backwards. Here's one of my attempts . I mounted my camera on a RC car and drove it down my hallway where I had strung christmas lights. I made a cutout of a man from an ad. and taped him on the bumper. //www.pbase.com/image/8592108
Message edited by author 2002-12-10 15:18:26. |
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12/10/2002 03:23:41 PM · #7 |
Originally posted by BadPigg:
Long exposure's with different types of light is fun too. Fluorescent lights will show a soft pulse. Neon lights will flash 60 cycles per second , LED will also.. you can write or draw with light , try spelling backwards. Here's one of my attempts . I mounted my camera on a RC car and drove it down my hallway where I had strung christmas lights. I made a cutout of a man from an ad. and taped him on the bumper. //www.pbase.com/image/8592108 |
Wow! That is pretty cool :)
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