 Monica R. Weit |
Aperature/Shutterspeed I recently purchased a book by Byran Peterson and was reading through one of the pages. I have a question about exposure. It says "to freeze the action of the pounding surf, I would have to rely on the aperature to achieve correct exposure. On the other hand, to focus solely on the shell I would have to rely on the shutterspeed in order to acheive correct exposure." I thought to freeze the action of the surf I would rely on the shutterspeed, and to focus on the shell I would rely on the aperature. Could you please explain this a little more. Thanks:)
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
might be a misprint. what's it talking about before all that?
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Jordan |
I think what he's saying is that once you've decided what shutter speed you need to freeze the pounding surf (for example 1/500), then to obtain the proper exposure you need to choose the appropriate aperature. For this, I would use my camera's TV mode to put it in the necessary shutter speed and allow the camera to decide which aperature would give me correct exposure. When focusing on the shell, I would use AV mode and enter the aperature I want (either a small aperature to keep the background in focus or a large aperature to blur the background) and then the camera will pick the right shutter speed to give correct exposure. Hopefully my explanation cleared it up a little more, let me know if you need anymore help.
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Monica R. Weit |
Thanks everyone. To answer Greg it says, " he noticed a shell on the ground, he said he has two choices to shoot straight down on the shell with a 50mm set at f/8, an aperature whose focus area begins and ends at the subject. The other choice was to lie down and using a wide angle lens , place the shell in the foreground and the pounding surf in the background:which would result in an entirely sharp image. I always thought to freeze an image you would use a fast SS speed and to show motion I would use a slow SS speed. Is this correct? Thanks:) Monica
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Jordan |
Man, this must be some complicated book. It took 5 minutes just to figure out what he was saying in the first quote you sent. But, to answer your question: Yes, you will need a faster shutter speed to freeze something that is moving than something that is not. If the object is stationary, you can use whatever shutter speed you want and get the appropriate aperature to get the depth of field you want, just make sure that if the shutter speed is too slow to freeze camera shake that you use a tripod. Hope it helps... Jordan
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