I was wondering about how fill flash affects the existing light. Of course\nit will take the shadows and lighten them up a bit, but what about the parts\nof the picture that are correctly exposed by the existing light? I mean the\nlight emanating from the flash (attached to the hot shoe) does not just go\nto the shadows. Wouldn't the areas not in shadow then be overexposed by a\nhalf stop? My fill flash photographs (from print film) have been coming out\nnicely but this conundrum has me scratching my head. On second thought,\nshould I be using some ratio method to compensate for the existing light\nexposure or is that not how it's done? I'm using a Minolta Maxxum 7 with a\n3600HS flash unit.