The 75mm is close to a 50mm used on a 35mm system.

But you might want to consider a moderate wide angle instead.

The 35mm aspect ratio is very rectangular (3:2 or 6:4) whereas the ETRS uses an aspect ratio that is closer to square (5:4). You may find that something slightly wider will appeal to you as a result.

In my case, I like using a 55mm lens with my Mamiya 645.