Thanks Michael,

While it is true about getting better portraits of Maria Eduarda, my real primary purpose is to have better resoltion and less grain on large enlargements and a negative / transparency bigger than 36 X 24 mm, for portraits, landscapes etc. I am assuming that the 75mm SMC F2.8 is the standard lens, and that is the lens I am looking at.

Being totaly ignorant about Pentax Specific Flahes especially for the 645 what would you recommend for a fill / bounce unit.

Again Thanks