2 questions flash photography?

Please answer both as clearly as possible secular. All this is very new to me. 1: EXPOSURE. When taking on manual mode, do I ignore the meter? … or should I allow the reading to say underexposed knowing add the flash of light? If yes, how many stops will be the best? 2: TV / AV: I read that it's really the shutter speed that mainly affects the exposure of the background so that you, it would be easier to maintain open and constant change of shutter speed. In this way, will be the shutter speed (or aperture priority) is better here?

Both good questions. 1. Exposure flash. flash synchronization is the most important factor you should consider before thinking about anything or meters. Most cameras have a shutter speed who works with the flash. In most cases it will be that shown on your camera that is red. Some, such as a Nikon D-40, sync speed 1/60th to 1/250th of a second, if that gives you choices. Flash uses what is called a GN (guide number). It is determined by the following formula where GN FD = XF (Film submit remote) xf (aperture setting) needed to obtain a correct exposure for a given film speed. Manufacturer GN must be regarded as estimates because NG is based on mathematics rather than mechanical, and many assumptions based on reflectance of the object, reflectance properties and the properties of the environment, image magnification, the development of film, minimum distance flash and the subject, the amount of ambient light, and the axis of the flash towards the lens. Your light meter readings of light room if you have reason to be ignored when determining your flash exposure, however, it is important that your shutter speed is in synchronization with the flash. The number of stops will be determined by your subject to flash distance and film speed and other considerations as the angle of the flash, if you bounce or diffuse the flash and reflective qualities of the object and the environment (light intensity Smoke room, fog or other conditions that shape). So in essence … I am quite confused that maybe you do some more research on lighting. 2: TV / AV: Most photographers (including myself) use Aperture Priority control factors of composition on the picture. If I want a blurred background, more attention to the object as in the model or portrait photography, I will extend my opening and adjust my speed shutter for proper exposure (most often I use my flash only as a filling – to highlight and accentuate my model). If shooting a product where I need more depth, I close the aperture according to my intentions. Remember that every photographer that you meet will provide you with personal reasons for doing what they do … myself included. That is why there are so few of us who have been as successful as as are not … it is the decision of creation and that is why photographers take decisions … to create images that copy. I 'm marking your interesting question because, indeed, it is.

Lesson 6 – Exposure meter

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