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General photography questions and answers: Discuss autofocus and manual focus...I am reading the book that came with my Nikon D80 and i'm trying to understand the focus thing. Now ...
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Old 01-11-2006, 11:03   #1 (permalink)
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Lightbulb autofocus and manual focus

I am reading the book that came with my Nikon D80 and i'm trying to understand the focus thing. Now why would you set your camera to focuslock? Can anybody explain that to me in very simple language please.
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Old 01-11-2006, 11:19   #2 (permalink)
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Re: autofocus and manual focus

Hi Dutchie,

Ok, keeping this simple because it is simple.... When your camera autofocuses, it doesn't always lock onto the area of the picture that you want to be sharpest focus. It will choose its focal point from an area of high contrast near the centre of the picture usually but you might want to have a person on the left of the picture as the sharpest part. When you move the camera, it usually changes focus automatically but in this case you don't want it to change.

SO....

You aim at the person you want to be really sharp, semi-press to get it in focus and then press focus-lock. Now you can recompose the picture with your person on the left and the camera will keep the same focus even though you have moved it. Now your shot will be as you wanted it and with the person in perfect sharpness.

I hope that is what you needed to know. let me know if you want more detail.

cheers,
Rob
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Old 01-11-2006, 12:36   #3 (permalink)
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Lightbulb Re: autofocus and manual focus

Perfect Rob, thanks very much. It just didn't wanted to click, but with your explanation it did. And that reminds me why the photo that I took yesterday was the way it was. I had my son on the right hand side and he was sharp and my daughter was blurred and in the middle. But I was just pressing buttons cause I didn't have a clue. So I must have pressed focuslock on it
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Old 01-11-2006, 12:57   #4 (permalink)
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Re: autofocus and manual focus

Make sure you are in AF-S mode and not AF-C as the camera will not focus lock in in AF-C mode, it is inteneded for moving subjects - sports etc.
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Old 01-11-2006, 14:30   #5 (permalink)
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Re: autofocus and manual focus

Quote:
Originally Posted by Dutchie View Post
Perfect Rob, thanks very much. It just didn't wanted to click, but with your explanation it did. And that reminds me why the photo that I took yesterday was the way it was. I had my son on the right hand side and he was sharp and my daughter was blurred and in the middle. But I was just pressing buttons cause I didn't have a clue. So I must have pressed focuslock on it
My pleasure Dutchie, glad it helped :o) That's what I love about this forum, we can all learn from each other. And boy do i still have a lot to learn. If I didn't I'd get bored but this wonderful hobby of ours always has something new to teach :o)

Cheers,
Rob
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