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Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 08:13 PM   #1 (permalink)
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I wanna take some photos of a girl by a waterfall but i want the water to be blurred (I understand how this is achieved) slow shutter style but her to be sharp as possible. Im willing to do the research if someone could point me in the right direction. I would imagine i would have to fire the flash at one point during the exposure but im not sure how i would do this (Im Guessing is something to do with curtain sync) I use a D70 with a sb-800 or a Pocket wizard Plus attached to monoblocks.

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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 08:39 PM   #2 (permalink)
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depends on how fast the water is flowing - if model is posed - 1/30 can still be sharp

or shoot from locked tripod - shoot scene without model with slow speed

then copy to scene shot with model - very restrictive
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 09:15 PM   #3 (permalink)
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I usually do these type of shots on manual mode. Set the camera (on tripod) with the fstop and shutter speed for the best exposure of the water (for the blur you want). Set the flash power appropriate for the fstop chosen. Fire the shot. The girl will be frozen by the flash, and the water will blur due to a longer exposure that you choose. Caution the model to remain still if shooting at less than 1/15th of second. Nothing to do with curtain sync as most cameras will sync at anything less than 1/60th. The flash will fire during the time the shutter is open.
Cheers,
rfs
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 09:21 PM   #4 (permalink)
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If you use a flash to keep the model sharp, it will be impossible to give the water a blurred look, since the spillover from the flash will hit some water freezing some drops and spoiling the effect. I would lock the camera onto a tripod, hit the model with a refector so she looks pretty, then use a very slow shutter (with digital you can test it, but the slower the shutter, the better the effect) and tell the model to hold still. You've seen this in some great scenics where the photographer shoots a river at a very slow shutter, but of course the rocks and trees aren't inclined to move on their own (except in certain parts of Caifornia during an earthquake). Test it at anywhere from 1/30th down to 1/2 second, and adjust your f-stop accordingly.

Regards,
Andy Pearlman
Andy Pearlman Studio
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 09:26 PM   #5 (permalink)
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I've done it both ways and it seems to me that you can use the flash if the distance from the water is enough to make the spill a non-issue. Also with the positioning of the flash at such a position that it doesn't reach closer water, it also seems to work. I like shooting without the flash, but some models just can't hold still enough during a 1/2 second shot. And if there is a breeze I always find some hair blur for the long haired models.
Do you find that the non-flash method tends to produce a softer picture than normal (not that that is bad for glamour)?
Cheers,
rfs
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-08-2005, 11:13 PM   #6 (permalink)
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I'm not a pro and this may not be the best example but it was done with an SB800 set to balanced fill(with the diffuser that comes with it). Camera on manual, 200 ISO and 1/10s handheld. She was about 20 ft from the water so the flash did not freeze the motion of the water. Hope that helps.


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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-09-2005, 02:22 AM   #7 (permalink)
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Your other option is to shoot with a f/2.8 lens which will blur anything that is behind her.

Jim
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-09-2005, 04:36 PM   #8 (permalink)
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1/10 handheld? I need to layoff the coffee!!!

Mike
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-09-2005, 06:40 PM   #9 (permalink)
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But won't that be lens blur from DOF rather than motion blur from a lengthy shutter speed? I think that may be a totally different effect.

Cheers,
rfs
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Re: Blurred Waterfall Sharp girl howz it done?
Old 02-10-2005, 12:31 AM   #10 (permalink)
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It would be a different effect, because it would blur everything behind the subject and not just the motion of the water falls, which is what the slow shutter speed would do. Simply an option to consider.


Jim
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