How to use an external flash?

How to use external flash, flash is very important for photography. For beginners who just learn photography, they don't know flash and don't know how to use it. Let me show you how to use an external flash. Let's have a look!

How to use 1 1 to flash, the direction of the flash head, pay attention to the angle of the lamp holder, and use the reflection law, that is, the incident angle is equal to the exit angle, to estimate the light falling position of the reflected light, so that the light will fall on the subject after reflection.

2. The reflective surface is generally light and white, because the flash emits a cold light source, and the white in the light color can be an unadorned reflective light source. Reflective surfaces of other colors will change the color temperature and easily cause white balance errors, while dark surfaces will attract a lot of light, which is not conducive to reflecting light.

3. Select an external flash. As far as possible, choose a flashlight with a large adjustable angle up, down, left and right, which will be more convenient and flexible when lighting. Flash lamps with built-in reflectors are generally expensive, or white cardboard fixed with rubber bands is a good and cheap substitute. The size of white cardboard can be controlled freely, and the lighting effect is often better.

Function of external flash

When taking a photo, the flash will be exposed because of the foreground, and the background of the photo is still dark, and there may be some ugly shadows, so sometimes when shooting at night, in the case of insufficient light, I would rather leave the photo empty than use the flash provided by the digital camera to make up the light. Flash comes in handy when there is no other light source to fill the light. Whether the shot works look good or not has a lot to do with the use of flash.

External flash is recommended.

Nikon SB-300

External flash: This is an external flash produced by Nikon, which is mainly suitable for digital cameras such as D3 100 and D5200. Nikon SB-300

The market price is about RMB 900 yuan.

Canon 600EX-RT external flash: Canon 600EX-RT

It is the external flash of all kinds of digital cameras produced by Canon Group. The effect of the brand's external flash is very good, mainly because its light source is very large, which can effectively provide sufficient light source for shooting.

How much is the external flash?

Like a digital camera, the price of an external flash varies with the brand and quality. Generally speaking, the price of foreign flash brands is around 300. For example, Stender Canon flash 320 yuan, while love figure Shi's flash has the function of flasher at the same time, and the price has reached 358 yuan. If you are a wage earner and want to buy an economical and applicable external flash, I recommend you to buy it from Yin Yan, Shenniu and other domestic flash. Generally, their price will not exceed that of 200 yuan. Some small digital camera equipment, the corresponding external flash even less than 100 yuan.

External flash settings

The method is as follows: the camera lens is forward, the flash button faces itself, the iron sheet under the lamp is horizontally inserted into the hot shoe (thin card slot) at the top of the machine, and the switch at the bottom of the lamp is locked after insertion. Then turn on the light and the camera. Press the menu key, select Flash Settings-External Flash, and then select E-TTL or Manual, usually E-TTL. That's basically it. If you get off the plane and flash, either the flash above your head has a flash function or you have a flash device. The installation method of flasher is the same as that of flash lamp. There are two kinds of flashers: RF signals and infrared signals. The former has long transmission distance and strong penetration, but if it is used to flash multiple lamps, it is necessary to equip each lamp with a receiver.

How to use 2 flash lamps for external flash lamps?

On-site lighting: The main function of flash lamp is to illuminate the site in case of insufficient light, so as to obtain the correctly exposed image. Most digital cameras have an automatic flash option. When there is insufficient light at the scene, the flash will automatically pop up and flash.

Increase shutter speed: Many times we use flash. It is not because the light is not enough to expose correctly, but by increasing the shutter speed to achieve the purpose of curing the dynamic image. For example, if you want to take pictures of water droplets or moving portraits, if you expose them according to ordinary photometric values, the images will be blurred and not clear enough, and these images can be solidified by flash.

Increase the depth of field: We know that the depth of field effect of an image is closely related to the aperture size. Usually, the larger the aperture, the smaller the depth of field. Moreover, the aperture is small and the depth of field is large. Using this principle, you can actually use a flash to increase the depth of field. Sometimes, due to the limitation of light in the scene, we have to use a large aperture to shoot, but the depth of field is insufficient, and when using the flash. We can reduce the aperture accordingly. Effectively increase the depth of field.

Highlight the prospect: many times we will find it in the shooting scene. The effect of the background is not ideal or not what we want at all. At this time, we can try to use flash to eliminate the background, because when shooting with flash, the shutter speed is high, and the background outside the projection range of flash will not be displayed because of insufficient exposure. Due to the flash lighting, the foreground is correctly exposed, thus highlighting the foreground and eliminating background interference.

Reduce contrast: Another common use of flash is backlight. When shooting, it is common that the contrast of light in the scene is too large (such as portraits in backlight). Because the brightness range that CCD or film can express is limited, some image details will be lost in the scene with excessive contrast, whether exposed to light or darkness. In this case, the best way is to fill the light in the dark to reduce the contrast of the picture. Of course, you can also reduce the light in the bright part. Flash is the most powerful weapon in this situation! The specific method is very simple. Just turn on the flash and let it illuminate the dark part when shooting, and the effect is generally good.

Adjust the color temperature: When shooting under electric light, the photos tend to show warm colors of yellow and red, because the color temperature in tungsten lamp is low, and the flash can effectively adjust the color temperature, thus correctly restoring the color of the subject.