Digital single lens reflex getting started tutorial lesson focus

A good photo, the most basic condition is to have good exposure and correct focus. In previous we have talked about the idea of the exposure and conversion method, behind will continue to teach you how to deploy the environment to the appropriate exposure combination, here we have to teach you the correct focus method with the concept. Auto focus function is now the basic functionality of a DSLR,

A good photo, the most basic condition is to have good exposure and correct focus.

In previous we have talked about the idea of the exposure and conversion method, behind will continue to teach you how to deploy the environment to the appropriate exposure combination, here we have to teach you the correct focus method with the concept. Auto focus function is now the basic functionality of a DSLR, especially ultrasonic motor drive and update the stronger focus program Assistant. Under normal shooting conditions, in order to achieve the correct focus is no longer the difficult things, but I still have a lot of people often shoot photos of lost focus, sometimes even experienced photographers will also be committed such an error. In order to help the beginner photographer friends can take clear pictures, here we have a list of some of the in-focus, easy negligence and error occurred. As long as the careful attention taken in some cases below, you can avoid losing focus or focus shift happens. 1. contrast low environment basically, AF systems are often use in contrast, after the operation and to reach an coking, the auto focus. This design in the shooting environment contrast comparison which occurs on the coke, it is difficult to achieve in-focus of action, which is generally used to say of 「introduction fans Coke 」. In contrast to the low environmental focus, you can move the focus to be on the same distance in contrast to the relatively large objects, complete the focus of the action, before the lens back to us within the scope of the composition. In this movement, after completing the AF remember to lock focus to avoid re-composition and lose focus on the good. General camera to lock focus to a half press the shutter, other more complex setting can see the camera's instructions to set this action. 2. low brightness of the environment in relatively low brightness of the environment, are also very prone to crush Coke. General camera set by the auto focus on the environment, have a certain brightness limits, below this limit, auto focus will lose its function. Now most of the digital SLR camera with af auxiliary lamp design, the luminosity is low, AF auxiliary lamp automatically glow to assist AF. But the little lamp usually power not strong, can help irradiation distance limited; in addition, the high order of digital single lens reflex cameras are usually no af auxiliary lamp design. How to solve is when shooting in low light, equipped with an external flash. Feature comparison of external Flash has a power stronger af auxiliary light features, even the projection will result in contrast to the red light to help focus. Another method is to use a flashlight or other external light source coming exposure, help focus can be successfully completed, or simply switch to manual focus, with their own eyes to confirm. 3. the focus is not on the Central when focus is not on the Central, we must first focus of the picture in focus, composition and back on again. For this action, often because of negligence, but the focus is to focus on running away, to not our original preset location. In the above point 1 「Introduction contrast low environment 」, referred to the use of half-press the shutter to maintain the original locking focus, usually in the shooting we easily because of neglect, but forget to do this action. So get into the habit of pressing the shutter half good habits, the composition is not focused on running away. In addition, the camera can also set other keys against Coke, shutter button then specialized implementation of metering and press the shutter. This setting also ran Coke can be avoided. 4. the photo is in a State of continuous movement when being taken body in a State of continuous movement, we have the focus before you press the shutter, possibly because the absorbed body had already left the position of the shooting, which happened to lose focus, as we make children play screen, easily occur. The solution can take advantage of the camera itself 「introduction continuous AF function 」, AF option cut to this location, the camera will automatically move was taken in, continuously do focus action until the shutter is pressed. Of course this feature is not a panacea, the camera itself, continuous autofocus feature is not powerful, occasionally have a grasp of the focus.