Hi, just another question to ask, will I need those big big flash i see other people have on their camera? it looks really cool and make u look professional. Also, i want to ask what is it for? I thought we already have a built-in flash?
Detachable flash give many things, some of the basics are: 1) more power 2)further from the plane of the lens- less red eye, flattening of the face etc 3) can be removed and use and slave (some) for multi-directional lighting 4) don't drain your camera batteries 5) look cool 6) add better red AF light 7) let you do strobing
yeah, basically it gives you more options; depends on what you take photographs of/how much you wanna spend
Beside those mentioned above, external flash also gives you:
- more power to reach further away.
- zoom head which disperse the light when shooting wide angle, or concentrate it for further reach if shooting telephoto.
- adjustable head for performing bounced flash.
- high speed sync that allows higher shutter speed.
- better clearance to avoid casting shadow from some zoom lenses.
For some Nikon lenses such as 18-200 lens, the built-in flash is unable to "climb higher" and results in sem-circle shadow at the bottom of the image when the built-in flash is fired. Problem is overcame by mounting a flash onto the DSLR hot shoe.
Therefore, an additional flash is necessity and not a "image making exercise".