Already it saw those photos of flowers in first plan with the deep one all desfocado? Another way to understand is to focar its vision in an object well next to its eye: you go to perceive that all the plan of deep leaves focus. FocalPara distance to understand the concept of in the distance focal is imagined looking at for a lock hole. The more you come close yourself to hole, greater its field of vision. On the other hand, the more you move away yourself, minor its field of vision. He knows those cheap digital machines that people have that to take off photos of far obtaining well to fit everybody? They are machines of very great focal distance.
Very well, understood. What more she is necessary to know on focal distance when will be to choose my lens? How much lesser in the distance focal greater the capacity of framing of the machine. This characteristic is especially important when you will be photographing in small environments or to want that photo of a great group of people without losing the face details. It knows those photos that we want to make of our room but that never they are good? For they need lenses with focal distance decrease.? On the other hand it is impossible to obtain a capacity of approach of the very great image (zoom) being kept low a focal distance. The problem is related with the length of the lenses with very zoom, that they finish moving away ' ' hole of fechadura' ' of the sensor of the camera. It stops finally to understand the such numbers of the lens, still lacks to understand a last concept:? Fixed lens: obviously they are constructed thus in the distance focal and the opening does not move. To use this type of lenses she is necessary to have some models to obtain to cover all type of situation.