The JVC BN-VF815 Battery external flash power than machine top convenient flash, and on the function also is quite comprehensive, carry rise very convenient, won't take up much space, so we call it "the go to the small".
External flash has a lot of kinds, in use and the most important is its power size and effective cover Angle.JVC BN-VF823U Battery Generally speaking, we use the external flash has a flash index, also is the NG value, the higher the index of flash, lighting is the range of the far.
Flash index still has an important role, that is suitable for calculated the aperture of the exposure. Despite the digital SLR phase chance to work out the aperture of the automatic right and appropriate flash output, and the photographer or it is necessary to know, appropriate aperture size equals flash divided by photographers jvc gr-d70u battery and unobtrusive index between the distance. If use index for 32 flash photography, range was taken 4 m people, so to get normal exposure, you will need to use F8 to the size of the aperture.
The external flash flash cover Angle is also very important, it will be used as the focal length of the lens change and change, the largest cover general Angle for about 28 mm, if use a wider lens, needed to use the lamp holder internal wide Angle flash of diffusion. If we don't change the Angle flash covered, so in the picture there may be dark Angle, this is because the flash Angle does not have completely covered by the JVC GR-DVF21U Battery picture.
In internal external flash, a small piece of white reflector, the reflector can use when reflection board. Because the use of external flash is taken directly on the character, the light curt and reflective, use small reflex the light reflector, the whole picture effect will be soft many. External flash can transfer the external accessories, such as light cover, its function is also to change the nature of light photos, make it soft and is not hard.
In addition, most of the external flash lamp can be jvc gr-df550us battery horizontal and vertical Angle rotation, that can change the light projection direction and the Angle, and sometimes also can use light color around objects, reflects the light of lighting is taken characters.
Now many professional level of external flash, have very advanced functions, such as through the wireless way of flash is the same led flash, this makes the Camcorber Battery photographer in creation have more control, can carry out a few flash light, produced a very professional photos.
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