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Old Feb 28, 2007, 8:06 PM   #1
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I May sound like a novice but how do you obtain those fantastic shots with a point and shoot camera such as my sony dsc h2 that have the primary subject focused and the backround blurred help please!
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Old Feb 28, 2007, 8:41 PM   #2
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What you are trying to do is narrow your depth of field, so that requires a large aperture (a small aperture number).

Lots of P&S cameras don't give you a large enough aperture relative to the sensor size to do that very well, so you can use post-processing to mask your subject and introduce Gaussian blur to the rest, to your taste.
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Old Feb 28, 2007, 8:52 PM   #3
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As docmoon mentioned, the challenge is sensor size. There are several components to getting the result you want:

1. Sensor size

2. Aperture (lower f-stop = more blur)

3. Focal length

4. Distance to subject

You can't change the sensor size, so to get the best affect, use the longest zoom the camera provides and the widest aperture (lowest f-number) - and simply adjust your distance accordingly so you get your subject in the frame. That will give you the best affect.

The challenge with docmoon's processing solution is it's difficult and time consuming to do it well - most people overdo it so the blur doesn't look natural, they don't apply it gradually so objects closer to the subject are more in focus than distant objects and there are usually rough edges outlining the subject. Give it a try. But in my book it's too much effort to get a realistic affect. But it is an option if the blur is important to you and you want to put in the time.
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Old Feb 28, 2007, 8:57 PM   #4
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Also if you can keep as much distance between your subject and the background as possible it will help too. Your digicam probably says your lens is f2.8 which would be a pretty wide apeture, but because of the sensor size that f2.8 is equivilent to about f11 on a 35mm camera or dslr, so you end up with a pretty large depth of field.
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Old Mar 1, 2007, 3:44 PM   #5
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ok ,thanks much, I'm looking forward putting your advice to use.
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Old Mar 2, 2007, 6:03 AM   #6
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ultranitwit2 wrote:
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ok ,thanks much, I'm looking forward putting your advice to use.
My FZ20 does "out of focus" (Bokeh) easily enough.

As noted, make sure you have a lots of space between your subject and your background.

This is a 735mm (432mm on the FZ20, plus the 1.7 T-CON) shot of a mirror ball.

The blurred background isa big Pine tree about 75 feet away.


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Old Mar 2, 2007, 6:07 AM   #7
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Here's anotherFZ20 shot: 340mm, snowy tree background
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Old Mar 2, 2007, 6:10 AM   #8
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AlAsaad wrote:
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Here's anotherFZ20 shot: 340mm, snowy tree background
And another, this time at full (432mm, f/2.8 FZ20 zoom.

The "Ball" is about seven feet from the camera, same snow covered tree.


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