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Cannot focus on a particular subject

What should I do if I cannot focus on a particular subject?

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If the camera is having a difficult time auto-focusing, you can try the FOCUS LOCK feature. This feature allows you to focus on another subject roughly the same distance from you and then move the camera back to the intended subject and take the picture without losing focus. First, turn the camera on and locate the Autofocus Target Mark in the center of the LCD. The AF Target Mark resembles an open and close bracket [ ]. Position this AF Target Mark on a subject roughly the same distance away as the subject the camera is having trouble focusing on. Press the shutter button halfway enabling the lens to focus. While holding the shutter button halfway down, aim the camera at the original subject and press the shutter button all the way down.

Posted on Sep 01, 2005

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1answer

The auto focus on my Sony Cybershot DSC-W35 is working i guess because the most shots that i take come out blurred... Can anyone help me with a quick solution because i need my cam urgently!!

THE TROUBLE WITH AUTO FOCUS ... is that it doesn't work well under the following conditions:
  • When the subject is not in the centre of the picture (particularly when there are moving objects in the background)
  • In low light conditions
  • If there is a bright light behind the subject (e.g. a window)
  • When the subject is bright (e.g. a car with its head lamps on)
  • When the subject is of low contrast - walls, the sky
  • If the subject is made up of fine repetitive patterns
  • If the subject is behind vertical bars or a chain link fence
  • When another subject passes between the camera and the point of interest
tip

Depth of field is the characteristic of how much of, or how deeply, the...

Depth of field is the characteristic of how much of, or how deeply, the photograph is in focus. If the main subject is in focus but the foreground and background are blurred, the photo is said to have a shallow depth of field. if most of the photo is in focus, including the foreground and background, the photo is said to have a wide depth of field.

Depth of field is controlled by the aperture setting:

- A wide aperture setting (indicated by a low f-stop number) will provide shallow depth of field, resulting in the main subject being in focus and the foreground and background being blurry. This setting is particularly useful when taking portraits or when using a macro lens.

- A narrow aperture setting (indicated by a higher f-stop number) will provide wider depth of field, resulting in the entire photo being in focus. This setting is particularly useful when taking landscape or wide-angle photographs.

The photographs below are examples of how the same subject will photograph using different aperture settings. Note that as the aperture closes, which will allow less light to reach the image sensor, the shutter speed gets faster to produce the appropriate exposure.



shajanrs.jpg

shajanrs_0.jpg

shajanrs_1.jpg

shajanrs_2.jpg

I think you have got a general idea about depth filed. If you have further questions, you can ask me directly. http://www.fixya.com/users/shajanrs






depth of field - what is depth field - how depth field affects picture - how to adjust depth field - DEPTH FIELD - depthfield - DEPTHFIELD
0helpful
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PORTRAIT SETTING ON Canon Powershot A710 IS GIVES EXACTLY SAME PHOTO AS ON AUTOMATIC. NEED I ACTIVATE SOMETHING ELSE TO GET A BLURRED BACKGROUND?

Portrait provides extra sharp focus on the subject. It also opens the aperture some, and may in SOME cases give you a blurred backbround depending on the distance of the subject and background to the camera.

If outdoors, consider setting the camera to manual flash so that it will lighten the subject. If indoors, consider turning off the flash. You may need to provide better external lighting on the subject, or use a tripod and ask the subject to hold still during the picture.

Try increasing the zoom (best is to set it to maximum), and then adjust your distance from the subject to get as close as possible. Note that you still might be standing relatively far away because of the zoom.

Another way to experiment further with focus and blurred backgrounds is to use aperture priority (Av) mode on your dial. Use the right/left button to set the lowest "f-number" on your screen. The lower the number, the greater the aperture. All other functions of your camera will automatically compensate. Again, use max zoom in taking closeups with low "f-numbers". Also experiment with the manual focus to pay particular attention to achieving sharp focus on your subjects eyes.

You have a very capable camera. It can do what you're thinking of. You just need to practice with it. It's digital, experiment with the above techniques. Throw away the bad pics and keep the good, noting which technique worked best for the lighting and situation.
0helpful
2answers

What am I doing wrong?

This depends on which Autofocus system that particular model uses.  Then manual should tell what is happening there- there is usually a more comprehensive manual on the supplied CD.
Failing that speak to the user support of you particular model
0helpful
1answer

Focus on a particular subject

Try the FOCUS LOCK feature. This feature allows you to focus on a subject roughly the same distance away from you, then re-compose your picture without losing that focus. Open the lens barrier fully. Look through the viewfinder at the AF Target Mark (the 4 lines in the center of the viewfinder). Position the AF Target Mark on a subject roughly the same distance away from you. Press the shutter button halfway until the green lamp lights. While keeping the shutter button pressed halfway, re-compose your picture, then press the shutter fully.
0helpful
1answer

Focus on a particular subject

Try the FOCUS LOCK feature. This feature allows you to focus on a subject roughly the same distance away from you, then re-compose your picture without losing that focus. Open the lens barrier fully. Look through the viewfinder at the AF Target Mark (the 4 lines in the center of the viewfinder). Position the AF Target Mark on a subject roughly the same distance away from you. Press the shutter button halfway until the green lamp lights. While keeping the shutter button pressed halfway, re-compose your picture, then press the shutter fully.
0helpful
1answer

Focus on a particular subject

Try the FOCUS LOCK feature. This feature allows you to focus on a subject roughly the same distance away from you, then re-compose your picture without losing that focus. Open the lens barrier fully. Look through the viewfinder at the AF Target Mark (the 4 lines in the center of the viewfinder). Position the AF Target Mark on a subject roughly the same distance away from you. Press the shutter button halfway until the green lamplights. While keeping the shutter button pressed halfway, re-compose your picture, then press the shutter fully.
1helpful
1answer

Focus on a particular subject?

If the camera is having trouble doing an auto focus you can try the FOCUS LOCK feature. This feature allows you to focus on another subject roughly the same distance away from you, and then move the camera back to your original subject and take your picture without losing that focus. First turn the camera on and locate the AutoFocus Target Mark in the center of the LCD. The AF Target Mark resembles an open and close bracket [ ]. Position this AF Target Mark on a subject roughly the same distance away from you as the subject that the camera is having trouble focusing on. Press the shutter button halfway enabling the lens to focus. While keeping the shutter button pressed halfway, move the camera back to include the subject you originally wanted in the image, then press the shutter fully. (Please see page 42 in the D-535 Zoom Reference Manual in Section 3, under the heading titled “If Correct Focus Cannot Be Obtained”, for a more detailed explanation.)
0helpful
1answer

Focus

If the camera is having a difficult time auto-focusing you can try the FOCUS LOCK feature. This feature allows you to focus on another subject roughly the same distance from you and then move the camera back to the intended subject and take the picture without losing focus. First, turn the camera on and locate the Autofocus Target Mark in the center of the LCD. The AF Target Mark resembles an open and close bracket [ ]. Position this AF Target Mark on a subject roughly the same distance away as the subject the camera is having trouble focusing on. Press the shutter button halfway enabling the lens to focus. While holding the shutter button halfway down, aim the camera at the original subject and press the shutter button all the way down.
0helpful
1answer

Focus on a particular subject

If the camera is having trouble doing an auto focus you can try the FOCUS LOCK feature. This feature allows you to focus on another subject roughly the same distance away from you, and then move the camera back to your original subject and take your picture without losing that focus. First turn the camera on and locate the AutoFocus Target Mark in the center of the LCD. The AF Target Mark resembles an open and close bracket [ ]. Position this AF Target Mark on a subject roughly the same distance away from you as the subject that the camera is having trouble focusing on. Press the shutter button halfway enabling the lens to focus. While keeping the shutter button pressed halfway, move the camera back to include the subject you originally wanted in the image, then press the shutter fully. (Please see page 20 in the D-425 Advanced Manual in Section 2, under the heading titled “If Correct Focus Cannot Be Obtained”, for a more detailed explanation. This Advanced Manual is provided on a separate CD, in Adobe PDF format.)
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