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21 Jun 2006 - 21:50

guitar man



Chrisguitarsmall.jpg



Christian brought his guitar today!

He's loaning it to Christopher, who says he'll agree to take music lessons if we let him take guitar.




I don't know why I can't take pictures in focus.


-- CatherineJohnson - 21 Jun 2006

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Does your camera have a long lag time between the time you press the button and the time it takes a picture? Some older ones (like my Kodak DCwhatever -- 280?) do.

-- GoogleMaster - 21 Jun 2006


i wonder if that's the problem

all these digitals are awful that way....

this is a new camera; we got it for Christmas....

-- CatherineJohnson - 22 Jun 2006


That looks like motion blurring, which is caused by too much movement of subject relative to camera while the camera's shutter is open. This can be fixed by reducing the amount of movement or reducing the time the shutter is open.

(Blurry photos can also be caused by focus problems, but parts of the photo look to be in focus, which would tend to argue against that.)

To reduce the movement, you need to stabilize your camera (by using a tripod and cable release or by simply bracing the camera against a stationary object like a doorframe) or take pictures of things that aren't moving. In the picture here, though, it looks like Christian and your son and dog are moving, which precludes this first solution.

The next thing to look at is reducing the time the shutter is open (increasing the shutter speed). Getting the proper exposure requires that a certain amount of light hit the camera's sensor. The amount of light that hits the sensor depends on the aperture (f-stop) and the ambient light.

When you are trying to capture moving subjects, you need to have either lots of light or a big aperture. Indoors, the light level is normally much lower than you think it is, so in some circumstances you can fix your problem by using more light. This can be either a flash (which has a set of problems of its own, but is often a convenient answer), or some other light source.

If these are not options (and they often aren't), the remaining choice is to increase the aperture. Most mid-quality and better cameras allow you to select either the exposure time or the aperture explicitly rather than using the camera defaults. Look in your camera's manual for the procedure for doing this. If you don't have that option, look for an indoor setting for the camera.

Just so you know, large apertures come with a cost of their own. When the aperture is large, the depth of field in the photo (the range of distances from too close to focus to too far to focus) narrows significantly. This means that things near the camera and things far from the camera will both be out of focus. Make sure your plane of focus is appropriate for your subject. (It is possible to get a picture with the background or foreground perfectly in focus and the subject out of focus.) Most camera auto-focus software will try to focus at a point near the center of the field of view of the camera.

(There are tricks you can use to force the camera to focus at particular distances, but we'll leave that for another lesson. Let me know if you want that lesson soon.)

-- DougSundseth - 22 Jun 2006


Doug!

I KNEW YOU WOULD KNOW!

THANK YOU!

-- CatherineJohnson - 22 Jun 2006


That's so helpful - I'm keeping it in a "camera file."

-- CatherineJohnson - 22 Jun 2006


If you want to improve your kid's chances of getting into college, then he should learn how to play the bassoon. :)

-- RudbeckiaHirta - 22 Jun 2006


lololollllll

no, what he really needs to do is WATER POLO!!!!!

I'M SERIOUS.

There are all kinds of moms down Maryland way who are shlepping their kids around to play water polo, because apparently Harvard recruits for its water polo team

-- CatherineJohnson - 22 Jun 2006


count me out!

ix-nay on the p-ater w-olo play!!!!!

-- CatherineJohnson - 22 Jun 2006