both pic 2 and pic 3 were taken in same time? a bit of on metering? ( so it is dark? )
Well, next time, when u focus on WHITE object, you can set to + 1/3 and on black object, u can set to -1/3. ( if u use one spot metering)
I guess that is why, your pic I is a bit over, and picII is a bit under.  |