sailorsmom wrote:
h2, do you use a flash when shooting a back-lit subject??
Short answer - Yes.
Depends what you want to achieve.
There are 3 senarios where you may want to shoot a backlit subject :
1. You want the light coming through subject eg
The stain glass window here is backlit and has plenty of light coming through, so doesn't need flash. Same if you were shooting backlit leaf aiming to show dark areas where the veins are - just expose for lightest area on leaf, and the shadow vein areas will be dark, giving a well exposed leaf with lots of detail.
2. You want a silhouette eg
Dark figures against a bright sky or buildings / rocks/hills against a sunset or sunrise. Here just expose for light sky background and you will have your silhouette - again, no flash.
3. Now, the situation you are probably asking about, eg the shot with the angel here (Will probably not be for you, but done with flash in manual (you set power of flash) to give statue light wanted)) or, more what you want to know, it may be someone you are photographing against a light background which will most likely be most times you shoot.
In this situation if you fire off a shot in automatic mode, with no flash, then your camera will probably try to expose for overall scene giving an underexposed subject ( faces too dark) and a slightly over-exposed sky (blown area or very light sky with colour almost washed out).
The amount of over / under exposure on subject / background will depend on whether you have camera set for spot, centre weighted or overall exposure.
Hope that makes sense.
In most people in light background shots, you'll probably have most success with person/s properly exposed if you use:
APERTURE PRIORITY
(set f stop required - ie low f number if you want background blur. Usually to hide bins and rubbish in background etc or if you want that lovely landscape, wedding party showing, a large f number.
Blur Bg f2.8, f3.2 or Bg showing around f22 or higher
CENTRE WEIGHTED METERING (Best chance of subject being properly exposed)
Have FLASH popup UP - ready to fire.
Try experimenting with these settings as a starting point and hopefully most shots will be in the hit zone.
Hope that helps.
Good luck with it.
Cheers