10 causes of blurred photos




Sharpness – one of the main criteria of quality photos. It allows you to focus on the relevant details. But with the sharpness of images from many photographers, especially beginners, there are problems. We will talk about 10 common cause of blurry picturesShutter speed too slow

This is the most common cause of blurry photos. If you think you stand still as a stone for half a second – simple, you are mistaken. When shooting without a tripod, use the following rules:

Extract should be equivalent to a focal length of the lens.

For example, if you use a lens with a focal length of 60 mm, the shutter speed should be 1/60 of a second or less; 200 mm lens with the recommended shutter speed – 1/200 second, and so on.

In some lenses and camera image stabilization technology built originally. This feature allows you to reduce the minimum shutter speed about three stops. Stop – is the amount of exposure, which means an increase or decrease in the amount of incoming light when shooting twice.

The slower the shutter speed, the greater the intake of light; the sooner the less.

60mm lens with stabilization can withstand a shutter speed of 1/8 second.

In addition, it is important to know what your personal minimum shutter speed. Tremor in the hands are at all – someone more, someone less. To find out at what shutter speed you start “Motion blur”, perform such an experiment. Set the camera’s shutter priority mode and shoot the same shot first with 1/500 and then decelerates it. Upload the photos to your computer, and determine at what shutter speed hand-shake becomes blurred photos .
The lack of a tripod

Tripod tripod or monopod, also can get rid of “Motion blur”. In some cases, one can you need to use a tripod?

When there is an opportunity not to shoot with it.
When it is impossible to use a faster shutter speed (for example, due to poor lighting).
When you need a slow shutter speed (for example, to blur something in the frame).

When using a tripod, turn off the image stabilization, as it may interfere. But do not forget to enable it when again will take a camera in hand.
Incorrect posture

In order not to lose the rare footage because of their fuzzy logic, learn to properly stand and hold the camera.

Hold fast on his feet, one of them a little expose forward, if a step. Because of this you will be able, on the spot, slip body right and left, as well as forward and backward.

Hold the camera with your right hand and the left bottom support the lens. In this case, try to press your elbows close to your chest.

Use the viewfinder instead of the screen. Then the person will be an additional point of support for your camera.

These are the basic rules . But there are photographers who go even further. They listen to your breath and press the shutter button at the moment between inhalation and exhalation.
Too large aperture

The aperture value also affects the sharpness of the photo, as it determines the depth.

Depth of field – is the distance between the object passed in the picture dramatically.

When the lens is focused, it does so at a certain distance – the so-called plane of focus. For example, if you focus at a distance of 4.5 meters, everything that is in the frame at this distance, will have a maximum sharpness. All that is significantly closer or farther away will be blurry. How pronounced this effect depends on the diaphragm.

At wide apertures (F / 2.8) the depth of field is very small. This effect is emphasized long lenses. If you use a telephoto lens and aperture F / 2.8, then the focus will be only a narrow strip of pictures. The smaller the aperture (eg, F / 11 or F / 18) will increase the depth of field.

But the choice of the width of the aperture depends on what kind of picture you want. So, to get the most dramatic photos, use a small aperture with a large number of F. However, do not forget: if you use a small aperture to compensate for the loss of light, will have to slow down the shutter speed. So, once again becomes relevant first paragraph.

You have bad eyesight? Wearing glasses? Then you should use the autofocus. Modern cameras are really smart, in many models of auto-focus function perfectly realized – just let her do what she can.

To adjust the focus for his vision, use the diopter.

Diopter – a device (usually in the form of a wheel) next to the viewfinder, allowing to adjust the sharpness of the image.

Diopter partly solve the problem and if you have poor eyesight, but for some reason you do not wear glasses.
Wrong focus

Let’s say your lens is properly configured, the camera is fixed on a tripod, you are shooting on a sunny day, using a small aperture and shutter speed fast with low ISO. BUT! All this will not save pictures from turbidity, if you properly focused. This is especially critical when using a large aperture, depth of field makes the thickness of a razor blade. Even a small miscalculation when focusing can “throw” of the subject is the focus area. It may also happen that you get a portrait with accentuated ears and bleary-eyed.

Part of the photo exhibit in their cells the option to automatically select the AF frame. This setting allows the camera to decide for itself what part of the picture should be in focus. Most modern cameras do a good job with this. Especially if the subject is in the frame strongly stands. However, when the composition is more complicated technique can make a mistake and not to focus where you want. To determine the focus point yourself, set the AF mode a single point.

Look through the viewfinder, you should see an array of small dots (in the case of the screen – squares) – a point of focus. They show where the camera can focus. Using a single point mode, you can control using the buttons to focus the camera precisely at the point that you need.

Many people know that the camera focuses on the need to press the shutter button halfway. And then, be sure to choose the correct object focus, you can press the shutter button fully and take a picture. This is a good solution. The problem is that the shutter button can be quite sensitive. Nazhmёsh weak – can not work, will have to refocus again. Nazhmёsh too – make the frame before the focus will be debugged. In addition, if the photographer makes some shots in a row, the camera will try to focus in front of each of them. That is why some photographers prefer to focus back button.

Focusing back button (back-button focusing) – is a method of controlling autofocus, in which it is activated not the shutter button, and a separate button on the back of the camera.

This button might be called AF-ON or simply Fn. It can be activated by default, and you must do so through the camera menu. After clicking this button, your camera will focus and will not try to refocus, until you click on it again. This allows you to change the composition and make different images of the same object – the camera will not lose focus whenever you release the shutter.
Wrong focus mode

There are three basic modes AF them equipped with most cameras:

AF-S – a focus frame is used when the subject does not move.
AF-C – long autofocus, designed to track the movement through the frame, and is used when moving subject.
AF-A – Auto mode (often is the default), in which the camera itself determines which of the two previous modes of use.

Inability to use the manual focus

Despite the obvious advantages autofocus, sometimes you have to resort to manual focus. For example, when shooting on a tripod and use a wide aperture in order to achieve shallow depth of field and want to make sure that the key of the frame in the field, then switch to manual focus. Zoom button at the same time allow you to adjust the focus, zoom in on 5-10.
Dirty lens and filters

If your lens spot, do not expect a clear picture. Cheap plastic filters in front of the lens also degrade the image quality. If you’re shooting with poor UV filter (UV), try to make some shots without it and understand how it negatively affects the image.
Poor lens

Novice photographers who sin blurry images often blamed it on bad objects. In fact, this is the last of the reasons “Motion blur”. But the object lens is still different.

The quality of the lens – is the internal construction materials +. Inside the lens consists of several lenses precisely aligned, allowing focus, zoom the image, as well as to correct optical aberrations.

Some lenses really sharper others. Some excellent job with the sharpness in the center of the frame (but not on the corners and edges), others give a clear picture only at a certain aperture, the third cause color fringing around the points of contrast.

In other words, each object has a unique character and work with one type of coping well with others – no. Also, any lens that has the aperture in which it works well. Usually, it is located in the F / 8 or F / 11.

For images with maximum sharpness is better to use lenses with fixed focal length. Carry two or three lenses expensive. But even the most simple and cheap fix lens can produce great results if you use it wisely.

You know the secrets of other great sharp pictures? Share them in the comments!

In: Technology & Gadgets Asked By: [18418 Red Star Level]

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