Digital single lens reflex getting started tutorial 11 extracurricular received Flash

In General, you want to compare to flash photography in a variety of changes or Flash output (that is, Flash brightness) larger application, simply use the camera's built-in Flash will have a lot of restrictions, so want to flash photography on advanced use of photography for beginners, we would recommend purchasing a function compares the strength of exterior Flash to match. External Flash can be divided

In General, you want to compare to flash photography in a variety of changes or Flash output (that is, Flash brightness) larger application, simply use the camera's built-in Flash will have a lot of restrictions, so want to flash photography on advanced use of photography for beginners, we would recommend purchasing a function compares the strength of exterior Flash to match.

External Flash can be divided into two types: one is available for different manufacturers of generic model camera, the other is dedicated for a specific camera models. Built into the digital camera Flash because it is directly to the strong light to shoot objects, therefore sometimes produces ugly shadows. This time it's better to use an external flash. Recently, you can use an external flash of the camera is also increasing. If you are using an external Flash models, needless to say it's too bad. Here the first let's take a look at Flash application of relevant terminology. First of all to see gn. In Flash specifications table, this figure represents the Flash power, GN (Guide Number, Flash index) refers to the Flash output level, the larger the when GN represents the Flash output of the stronger, the launch of Flash capability. About GN formula: GN = F (aperture) x m (meters, representative and be shot from distance) in this formula is based on ISO 100 standard shooting environment. For example, when a Flash of GN 40, when we use the F4 aperture, Flash's range can be reached within 10 meters of the range. Then take a look at the Flash in photography, the use of several different modes of operation. At present the General market of external flash modes of operation: M-mode, A mode, TTL mode, the high-order bit of Flash will have FP model, let us make these models a simple description. M mode: full manual mode, users must follow the filming of the aperture with distance, to adjust the Flash's output. The advantages of the M mode is output, as long as you adjust the value, every effort will be taken of Flash is a fixed amount of light, the disadvantage is the need to adjust, in-the-spot emergency, the need for time-consuming adjustment in the calculation. A mode: automatic mode, use the Flash on the photoreceptor on environment for metering, and then combined with the aperture setting to make the camera. A mode of operation of the principle is similar to M mode, simply adjust the output of the work with light into the Flash to perform, the photographer as long as the work of adjustment need to the aperture. TTL mode: TTL mode will be based on a combination of cameras set the exposure, shutter just light pressing start glow, and then by the camera's TTL exposure calculation of the amount of light until sufficient exposure. Generally speaking, so long as the camera metering system enough accurate, use TTL mode can be more appropriate exposure. TTL contrast is too large or all black or all white shooting environment, if you are not appropriate for the exposure compensation will shoot too light or too dark photos. FP high speed Flash sync mode: (FP High-Speed Sync), in this mode, the Flash the collocation of the shutter speed is no longer affected by the camera Flash sync shutter speed limitations, FP function in Flash you can make use of stroboscopic manner with the highest shutter of the camera to achieve synchronization. However when using FP model, because Flash continuously lowers strobe output. In addition, we have to mention 「introduction irradiation angle 」 this term. Irradiation angle is combined with the use of the lens, Flash itself can cover exposures angle range, generally speaking, the currently available flash exposures angle General from 24mm ~ 85mm, about covers us photographic is commonly used in the wide angle end until long focal length. Advanced Flash in lamp holder will also be accompanied by a 「introduction diffusion piece 」, pull it down, the Flash of irradiation angle can widen to 16mm already covered, this hyperlink jiaoduan to wide-angle range. To remember is that when you use the APS sized DSLR, the first on the lens multiplication, 1.5 or 1.6 to corresponding Flash of irradiation angle. The above a few nouns is watching Flash specification sheet, you should first familiarize yourself with the knowledge of the content, then we will then discuss the basics of Flash.