She's very cute and I like the photo, and thanks for the critique leandroc76.
Compuwar, I would like to ask you a question, I know that you can tell from my picture that I need to reduce to 2/3 stop of my flash, but I'm still a beginner, how can I know that? (I mean, if I have more experience and more knowledgeable, probably I can know it too, hopefully ^_^) but for the meantime which books or ways do you suggest me to do to know it?
(sorry for my english).
Your English is great, don't apologize because there's an old saying that I think applies here- What do you call someone who speaks three languages? Trilingual! What do you call someone who speaks two languages? Bilingual! What do you call someone who speaks one language? American!
2/3rds is just a starting point- but it's probably in the right ballpark-
You should know from basic exposure (I've heard Understanding Exposure by Patterson recommended a lot- but haven't actually read it) that each stop of light is either halving or doubling the amount of light hitting the film plane or sensor- so for instance going from 1/250th to 1/500th of a second halves the amount of light because the shutter is open for half as much time, or going from f/4 to f/5.6 halves the amount of light, which is why you can get a valid exposure for f/4 at 1/500th and f/5.6 at 1/250th- each value for ISO, aperture and shutter speed move the exposure the same amount (1/3rd of a stop on most camera's smallest settings, 1 stop on "full" stop values.)
If we look at your shot, we can see in the white outfits that there's not a lot of fabric detail, generally that indicates that the shot is overexposed- so we could simply adjust the *exposure compensation* 1/3 to 2/3rds of a stop downwards and get some more detail in your daughter's shirt (the second shot is less over-exposed, so we can see more detail in the white clothing.) But if we look at the background that the low-powered flash didn't reach well (and remember that light is half or twice as bright as a function of distance, so there's stops involved there too) we can sort of estimate that if the background were say twice as bright, it would look much less like a flash scene and you'd be what's called "dragging the shutter" if you changed your exposure values to allow more "ambient" light- that is the light that's not from your flash. In this case, the difference in light adds to the depth of the image and helps to isolate your subjects, but you've got hotspots on their faces near the eyes where the light's reflecting, so the best thing to do (and heck it's a rule of thumb- anytime you're using fill flash, just dial the *flash compensation* down at least 1/3 of a stop) is to decrease the flash power and take the shot again. Since it's easy to do, you can try different values- but you have to remember that the distance and overall scene brightness is going to affect how much power you're going to want to dial down- you'll come up with a general "rule of thumb" value for your camera and flash (I'm almost always at -2/3rds indoors or outside on a cloudy day and -1/3 outside in sunshine if I'm letting the camera/flash do the calculations with a single flash.)
For reading, I highly recommend "Light, Science and Magic." It's one of the flat-out best photo books I've read.
In the first shot, I'd probably adjust both the flash and exposure compensation downwards, but the flash is the main thing. In the second I'd adjust just the flash.
Really though, it's experience- so just find out where the flash and exposure compensation settings are for your camera and try them out, take several pictures and take notes about what you changed- distance, exposure, flash, any two, all three- up, down and how much- then you'll learn how it changes your pictures and what "look" you like- you may not like things the same way that I do- so it's best to experiment.
Paul