If the op's camera has the 45mm f2 Ektar lens, then that is a very special lens indeed (and there is nothing wrong w/ a good Elmar either). Back in this time era, Kodak Ektars were truly in a glass of their own. I had a Retina w/ an Ektar lens, and it was maybe the sharpest lens I ever saw. Bitingly sharp, and it gave very clean images.
Myself, I prefer an Elmar because I like the character of the early Leica lenses, but the Ektar was the top lens for Kodak, no matter what format.