Sorry, I almost forgot I posted a thread.
I didnt scan my slide. Maybe I shd.
Well, I asked around, seems that the problems lies with my camera metering.
There seems to be some error ...and perhaps I send it for checking see how loh.
There are occasions that the meter points at 0, still come out underexposed. Looks like I minus ½stop kind of feeling.
And got 2 times, no matter wat mode I turned to, the EV got stuck at -2. I checked my setting all, didnt set anything wrong. Even my asa is auto dx coding. So I suppose, time to get it checked