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When you press the shutter release button down halfway, the camera’s Auto Focus feature automatically focuses the image. The focus frame turns green if the subject is in focus This is what it should be but when i press the shutter release botton half way, the focus frame turns RED when my subject is in focus sometimes it turns to GREEN that takes good pic
but when it turns to RED it take aweful pics and most of the time it turns to RED (%95 of time)
can you tell me what is causing this problem?
The focus frame will go green when the camera has focused and red when it has not. Either the camera is not in the right setting for the subject you are shooting, ie. you are shooting up close and not using the macro mode, or the lens assembly is defective. In that case, contact the manufacturer.
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
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You did not say which camera body you are using, but you probably have three different auto-focus modes on you camera. You might be using the wrong one.
The modes are as follows:
AF-A Mode: Camera automatically selects single-servo autofocus when AF-A subject is stationary, continuous-servo autofocus when subject is moving. Shutter can only be released if camera is able to focus.
AF-S Mode: For stationary subjects. Focus locks when shutter-release button AF-S is pressed halfway. Shutter can only be released when in-focus indicator is displayed.
AF-C Mode: For moving subjects. Camera focuses continuously while AF-C shutter-release button is pressed halfway. Photographs can be taken even when in-focus indicator is not displayed.
This issue can occur in the following circumstances:
The subject is too close to the camera lens
Insufficient lighting
Subject movement
Camera movement
Incorrect camera settings
Incorrect camera operation
Follow the steps below to help prevent taking pictures that appear blurry, out-of-focus or distorted.
If the camera has both an auto focus and manual focus mode, make sure it is set to auto focus.
Make sure there is enough lighting to allow the camera to focus on the subject.
Make sure the camera settings are set appropriately.
When taking close-up or macro-type shots, ensure the subject is not closer than the minimum focus distance of the lens. Also, if the camera has a zoom option, set it to the W (wide-angle) position.
If you have a fast-moving subject and the camera has a Program AE mode with a higher shutter speed (such as Sports action), make sure it is enabled. Also, if the camera has an ISO control, set it to a higher setting.
If your camera has a SteadyShot/anti-blur function, ensure it is enabled.
Aim the camera at the subject.
Press the shutter button halfway down.
NOTES:
Pressing the shutter button halfway down allows the camera to focus automatically. A flashing green indicator will be visible in the LCD or viewfinder. When the indicator stops flashing, focusing is finished and the camera is ready to take the picture.
Some camera models have a Monitoring AF setting that can be selected which allows the camera to focus without the need to hold the button halfway down. Consult the instruction manual of the camera for information whether or not this is applicable for your model.
This is a common situation with most compact point&shoot cameras. The camera has to do a lot of work when you press the shutter release button: it must focus on the subject, meter the light for proper exposure, and switch the electronics from displaying on the LCD to recording the image to memory. Larger (and more expensive) cameras have additional hardware to deal with most of this, eliminating the "shutter lag."
You can reduce the lag by pressing the shutter release button halfway to focus and meter the exposure. Keep the button halfway down until the right moment and then press it the rest of the way down.
This is "shutter lag," the delay between pressing the shutter release button and the camera actually taking a picture. This is a common situation with many compact cameras. The camera has to focus on the subject, meter the exposure, and switch the circuitry from displaying on the screen to recording the image and saving it in memory. More sophisticated (and expensive) DSLRs eliminate this shutter lag by having more dedicated hardware for this.
With a compact camera, you can reduce the shutter lag by anticipating the shot. Press the shutter release button halfway to focus and meter the exposure. Continue to hold the shutter release button halfway until the right time, then press it the rest of the way.
There are four focus modes: S-AF (Single auto focus), C-AF (Continuous auto focus), MF (Manual Focus), and S-AF/MF (Simultaneous mode).
(SINGLE Auto Focus): Focusing is performed once when the shutter button is pressed halfway.
C-AF (CONTINUOUS Auto Focus): The camera repeats focusing while the shutter button is pressed halfway.
(MANUAL FOCUS): The function allows you to manually focus on any subject while looking through the viewfinder.
SIMULTANEOUS USE of S-AF mode and MF mode: You can fine-adjust focus manually by turning the focus ring after AF is performed in the S-AF mode.
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.
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.)
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.
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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