In the case of insufficient light or backlighting scenes, should we open a large lens aperture to shoot, or start a flash to compensate for the light, in order to achieve the desired effect? Professor Herman, a veteran photographer, came back here to explain what places are suitable for large aperture, what occasions are suitable for flash, and what subjects are suitable for large aperture plus flash, and understand all the correct concepts in one breath.
The so-called large aperture lens, Herman's definition is that the aperture can reach more than F4 (including) lens. And flash, of course, refers to external flash. These two are often recognized by novices as sharp tools to speed up the shutter speed of the camera and improve the success rate of photography, but is this really the case?
Large aperture lenses can easily take shallow depth-of-field photographs using their large aperture. Of course, in the same environment, a larger aperture can increase the shutter speed of the camera, and naturally reduce the hand vibration problems that may arise.
_The shallow depth of field effect of large aperture at telescope is the most obvious.
_The gradual blurring of the background is the charm of the large aperture lens.
_The second advantage of large aperture is that it can increase shutter speed in dim environment or without increasing ISO sensitivity. Moreover, focusing is easier than small aperture.
So what about the flash? First answer: Flash is not helpful to increase shutter speed, but it can provide the light source we carry with us. It's up to you to decide whether to fight or not. Herman couldn't understand why people on the Internet overwhelmingly denied the flash, saying that playing in restaurants would affect others and so on. To be honest, with flashes, how to use them? Photographers should have a certain understanding. You can decide not to interfere with others. If Herman knows martial arts, doesn't it mean that Herman uses martial arts to solve all problems?
_Flash with low-light night scene portrait. This is a picture taken with slow synchronization of flash and large aperture lens. At the time of filming, Herman was sure he would not disturb passers-by (because no passers-by passed by). The purpose of lighting is to make the model's face and body have a more correct and beautiful color.
_Backlight compensation. Of course, it depends on the flash. If you want to take pictures of people with proper exposure and background color and blue sky.
Of course, you can take silhouettes. As long as You are happy.
Light in broad daylight. Yes, don't think flash can only be used at night, or during the day. This is a large aperture lens, in the daytime, outdoor (corridor) use cases, this picture is not the use of flash.
_This is a flash.
This is a flash.
_This is intentional use of flash, and use force to shoot.
Use flash for special effects. This is the original scene, without any external artificial light source.
In the same place, we put a flash in the background. Make a totally different feeling from the one shown above. I think that's why friends who don't like to use lights hate flashes. It really "destroys" the original feeling. But Herman thought it was fun.
_Make up a picture with 35mm F1.8 and no flash. In backlighting, as long as you make good use of exposure compensation, or the camera M mode (but let the light meter display in excessive state), you can make the face have the exposure you want.