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Old 04-09-2011, 06:24 PM
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Default How to Autofocus in Darkness?

Hello, everyone. May you help me?

I'm beginner to lighting. I switch off all the lamps in my room, and use the SB-900 in remote mode to lighten the picture by bouncing its light off a white ceiling. The D7000 struggles to auto-focus on the model's eye. The results are blurred. I can't used the AF illuminator because the model is complaining.

Q1: How to auto-focus in such situation? What wrong am I doing?

Q2: Although the commander built-in flash is set to [--], it still fires. Is this normal?

Thank you in advance.
Adel.
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Old 04-09-2011, 08:09 PM
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Quote:
Originally Posted by Adel99
Hello, everyone. May you help me?

I'm beginner to lighting. I switch off all the lamps in my room, and use the SB-900 in remote mode to lighten the picture by bouncing its light off a white ceiling. The D7000 struggles to auto-focus on the model's eye. The results are blurred. I can't used the AF illuminator because the model is complaining.
Who cares what models think?

Quote:
Originally Posted by Adel99
Q1: How to auto-focus in such situation? What wrong am I doing?
You need more light, there isn't a whole lot you can do about it other than the AF illuminator. Have you tried manual focus?

Quote:
Originally Posted by Adel99
Q2: Although the commander built-in flash is set to [--], it still fires. Is this normal?
Yes, that's how it triggers the remote.
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Old 04-09-2011, 08:14 PM
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I use an SB speedlight as an AF-Assist only in some cases when it's very dark. Doing longer-range studio shots in a dark nightclub counts, for sure.
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Old 04-09-2011, 08:46 PM
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Thank you, jdepould and OsmosisStudios for the answers.

Quote:
Originally Posted by jdepould
Have you tried manual focus?
Yes, and I've failed. I find manual focus too hard.
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Old 04-09-2011, 09:09 PM
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...stupid question, but why are you turning all the lamps off?
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Old 04-09-2011, 09:14 PM
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...a possible solution, shine a flashlight on the subject, let the camera lock focus, flashlight off, and quickly take the shot. Sounds crazy, but may work
Also, make sure your camera is set to single focus mode...if in continuous, it may try to re-focus after you douse the flashlight
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Last edited by autofocus; 04-09-2011 at 09:17 PM.
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Old 04-09-2011, 09:22 PM
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Quote:
Originally Posted by autofocus View Post
...stupid question, but why are you turning all the lamps off?
Sorry if being stupid, I'm very new to the subject. I first thought I would eliminate the effect of other light sources other than the sb-900.
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Old 04-09-2011, 09:25 PM
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Quote:
Originally Posted by autofocus View Post
...a possible solution, shine a flashlight on the subject, let the camera lock focus, flashlight off, and quickly take the shot. Sounds crazy, but may work
Also, make sure your camera is set to single focus mode...if in continuous, it may try to re-focus after you douse the flashlight
Thank you.
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Old 04-09-2011, 09:29 PM
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Quote:
Originally Posted by Adel99 View Post
Sorry if being stupid, I'm very new to the subject. I first thought I would eliminate the effect of other light sources other than the sb-900.
I was referring to my question being stupid, not yours
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Old 04-09-2011, 09:57 PM
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Quote:
Originally Posted by autofocus View Post
I was referring to my question being stupid, not yours
It's Ok. Thank you for the help.
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