...how slow you can go on shutter to capture the ambient background while lighting the subject in the foreground without getting any ghosting or movement showing?
azpix Goldmember  3,335 posts Likes: 19 Joined Oct 2006 Location: Chandler, Arizona USA More info | May 17, 2008 17:39 | #1 ...how slow you can go on shutter to capture the ambient background while lighting the subject in the foreground without getting any ghosting or movement showing? Gear- 7d, 24-70L, sigma 70-200, Sigma 120-400, canon 50 1.4, Canon 100 2.0,sigma 10-20 and a DJI Mavic Pro Drone
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MikeMcL Goldmember  1,411 posts Likes: 1 Joined Jun 2006 Location: Dayton Ohio More info | May 17, 2008 17:43 | #2 that all depends on the amount of movement by the subject. I would do at least 1/60th... probably a bit faster. 350d, 5d, 28-70L, 70-200L, 430EX,
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CurtisN Master Flasher  19,129 posts Likes: 11 Joined Apr 2005 Location: Northern Illinois, US More info | May 17, 2008 19:34 | #3 Motion blur in that scenario is the same for any other ambient light exposure. It depends on camera movement, subject movement, and focal length/sensor size ratio. "If you're not having fun, your pictures will reflect that." - Joe McNally
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BobD. Member 141 posts Joined Apr 2008 Location: NJ, USA More info | If not using a tripod then your ability to hold the camera steady would factor in also. Everyone's capability in this area will vary some.
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cdifoto Don't get pissy with me  34,092 posts Likes: 47 Joined Dec 2005 More info | May 17, 2008 21:35 | #5 Approximately 2 stops under when dragging the shutter. Basically you'd have to be bouncing flash and not really bringing in the ambient but actually pulling up the flash's light falloff. Usually when you're doing that there's no ambient worth speaking about anyway.
Normally 1/15th wouldn't even freeze a turtle in the Olympics but here, since flash was the only light source for this exposure (there were sconces on the walls and chandeliers hanging from the ceiling but they weren't bright enough to add to the scene), their motion was stopped. There's a wee bit of ghosting on her blouse because I was really pushing the threshold, but it's not too bad. You can only see it at 100% or so. 1/20th would have worked too. It looks like there's ambient light because 1/15th brought up the light that fell behind the dancers and onto the people behind. Did you lose Digital Photo Professional (DPP)? Get it here
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cdifoto Don't get pissy with me 34,092 posts Likes: 47 Joined Dec 2005 More info | May 17, 2008 21:53 | #6 Again. 1/15th freezing the motion of the dancers because flash was the only light source.
Keep in mind though it's not so much about the shutter speed but rather the ratio of ambient light to flash. Just barely blinking underexposure on the camera's meter is a good starting point. When you start to get closer to the middle on the camera meter, that's when having a faster shutter becomes necessary. Did you lose Digital Photo Professional (DPP)? Get it here
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