External flash or hot-shoe
In the course we saw that the external flash hot-shoe'' or'' are those that do not come with the camera and purchased separately.
Must be connected to the camera in some way (for a PC cable, radio or infrared system) but are independent of the camera.
We also saw how we can use in manual, automatic or TTL (always depending on the model and brand that we use flash).
In this part of the course we will see some examples of how to use an external flash for better pictures.
Generally when we use an external flash we do to improve the quality and quantity of light. What we do is fill in the shadows or dark parts to make the picture come out well exposed and illuminated.
So we will use to achieve different creative effects, which can only be achieved when using flash.
When using the flash as fill what we're really doing is exposing 2 photos into one. Basically we are exposing the flash light more ambient light.
Of course we draw a picture and is an exhibition, but each light is controlled somehow by a single value.
What you need to know when flash photography is that the aperture controls the flash. The speed will not have any effect on how you leave the flash exposure.
The only thing which must be careful not to use is a speed higher than the synchronous speed of the camera. So if I have a sync speed of 1/125, when I get flash I can not overcome that speed.
Failing to use a higher speed can generate certain limitations when taking pictures in situations where there is light.
Since we can not use a high speed it is likely that we have to use a relatively closed diaphragm, such as f / 8 or f/11 (sometimes may be even more closed).
This means that, unable to use more open aperture (f / 4, f/2.8, etc..) Will be more difficult to achieve shallow depth of field.
More difficult,'''' does not mean impossible. Remember to vary the depth of field can change the lens or lens focal length and zoom in or out according to what they want to achieve.
Turning to flash. How do we expose a flash picture using the camera in Manual mode? And how do we mix flash with ambient light and the photo comes out correctly exposed?