Flash synchronization
Synchronize the flash is to harmonize the camera shot, the shutter and flash fires. The flash must be fired when the camera shutter is fully open.
With the shutter curtain is a high speed sync, otherwise part of the photo would not get light and dark.
Why is this? Because the camera shooting the first curtain opens to let light through. And then the second curtain is closing to prevent light from passing further.
The sync speed is the highest speed at which there is a time during exposure where the shutter is fully open.
So when the flash fires get all the photo flash light.
If we use a higher speed, the photo is exposed in parts, so when the first curtain opens, the second is already closing behind.
Then the flash light will illuminate only part of the scene.
The synchronous speed will depend on the make and model of camera you are using, but generally do not exceed the speed 1/250 (with some exceptions).
Before using Flash have to know what the speed with which they can take pictures with flash.
The lens shutter cameras that use these restrictions do not exist because at some point, no matter the speed, the shutter is fully open.
And that's when the flash fires to illuminate the entire scene.
Some cameras offer a feature called FP sync or HSS.
This feature allows you to take pictures with high speeds, because instead of making a single shot flash, makes multiple shots to expose the entire picture.
To use this function, the flash and the camera must be compatible.
There are many brands and models of flashes. If you are interested to buy one I recommend they find out and investigate it first.
You can find information on homes that sell photographic equipment, seek advice from someone who knows the subject, and research in Internet users say they care about flash.
This is critical because their opinions will be sincere and disinterested, and can help them make a decision
