Lighter method is have the aid of what go up at camera is automatic to anxious system. Although be opposite automatically,anxious system is opposite quickly good central point, but if use a method to have by accident, cannot develop its due effectiveness. That is to say, take the put oneself in another's position that be photographed properly inside casing of range finding of center of window of find a view only, ability is achieved accurate to anxious purpose. If camera is deployed camera lens focal length is not very long, the perspective is bigger, plan the system of motion that be photographed inside casing of range finding of center of casing of find a view, it is easy to still calculate; If camera place is deployed the camera lens of long focal distance that camera lens is 200 millimeter above, because the perspective is lesser, want to track the system that be photographed already, want to aim range finding casing again, may feel very demanding. To get used to this kind of circumstance, might as well change afore-mentioned habits, the limits that can take no account of casing of find a view temporarily how, use range finding casing to track the system that be photographed only, go up in the feeling so may a few more relaxed. If want be photographed the athlete is patted in the picture the central position beyond, and when using system of automatic range finding even, should use pair of anxious automatic locks to decide device, make a focus fixed live. If be photographed,body submits intense and mobile form, not concessional benefit decides device with the lock on time, and composition of a picture must beg a body that be photographed to be placed in the picture again the beyond position central cannot, must remove to be opposite automatically right now anxious, and instead hand is moved right anxious.
There still is one to plant when taking sports picture pair of commonly used anxious methods, that is trap focus, enter the immediately when booking a focus to press when the body that be photographed namely the shutter of camera. A few advanced watch for an opportunity have this kind of property. Trap focus very apply to sports photography, if use this method,will film high jump athlete has flown the start of rail is very good. When filming, the some that can move the central point in the athlete to may cross rail first is nodded, decide focal lock next, make its no longer around is mobile, the circumstance when inspecting an athlete to fly across rail finally presses shutter, can film the photograph with very high definition.
Be worth what say is, if be photographed,system moves with splitting speed, be like cycle racing, we are in when using trap focus skill, still must press ahead of schedule move shutter. Should arrive at the one instant before this place to press in main body that is to say shutter. Press shutter ahead of schedule, can make up for press shutter opens that paragraph of equation of time between actually to shutter. Of course, current and certain advanced automatic already caught up with to pair of anxious ability of anxious camera the speed of cycle racing, although cycle racing is,go up from the picture with top speed transverse fleet and pass, also can pat it. Which can if you are in,not clear mobile pass a bit, know to be able to carry some district only, can be opposite with area so anxious means, high speed film is used as far as possible when filming, according to radial condition and film speed, use small aperture as far as possible. To Jiao Shi, according to the watch of depth of field on camera lens, let this one area be in limits of depth of field in, the 1 ／ that is opposite exact focus in this one area to stand by camera one party 3 place, the depth of field after because prospect is difficult,be less than. Such operation, can achieve better result. If the athlete appears on further distance, the means that can use hyperfocal distance films. In the watch of depth of field from camera lens but the limits of depth of field with fish and the corresponding aperture that when filming, use, the depth of field after turning focus annulus makes next indicates the infinity that aims focus annulus indicates, this will make you acquire the biggest depth of field below uses aperture. If be photographed the area that the athlete will have regular ground to appear in a few far and near to differ, usable punched tape makes a group, outfit go up in distance annulus, had better use white paper, the number of a few special section is set above, want only before take a picture according to mark focus, can determine focal position quickly, need not be opposite through viewfinder at all anxious.
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