For example, indoor photography lamp power from more than 100 watts to several hundred watts have, different brightness, placed different positions.And the flash was only for a moment.Well, in that case, is the SLR metering system or an external meter useless?.Thus, neither the A nor the S files can calculate the proper aperture and shutter combination by the camera itself. (a personal understanding of the two files, the last shot of the film will be exposed, because the flash that moment must be much lighter than the interior when measuring)Finally, only use the M file, try to shoot after experience, and then fine tune.
Small studio lights flash metering system use it inside the machine, it is generally based on the flash shooting distance = aperture * flash index formula to determine the exposure, it is the most multi lamp lamp according to the main index to measure the aperture value, must use the camera to the M file. The external meter is still useful... Before the formal wedding shoot, the meter was measured with an incident light meter.
It must be a M file. The speed is set to the flash sync speed, and the amount of exposure is manually controlled with the aperture.However, when the aperture is too large, the light in the room will interfere with the color temperature of the picture, so it is usually not appropriate to set it to be larger than 5.6.You can only rely on the output of the control knob to adjust the strobe light, assuming the flash output settings at maximum, if excessive exposure to small adjustment to correct exposure can be set in the flash output hypothesis; the maximum number, still insufficient exposure to only for larger power lights or add lights.
The maximum sync speed depends on the camera, and the Nikon camera can reach the sync speed of 1/8000 by itself, but non professional cameras are usually only within 1/500.When the camera flashes, other sync lights flash, and the camera doesn't think it's shooting with its own flash. That is to say, do not synchronize with the shutter. So the shutter speed can be adjusted a little faster, but it should also be in sync, or even a little slower.In addition, if you use a flash, it is not a shutter speed. The meter is useful, but only for the flash. This part is useless. Some friends like to use slow door flash, flash flashing main body, background with slow door exposure.With aperture priority, the amount of exposure can only be changed by distance, the index of light, and the ISO. Of course, distance and index are only for people or objects that can be flashed, and ISO can also affect the ones that cannot be reached..
