The 75 1.4 almost requires a magnified finder but I shot it for years, up close and wide open, with a .72 M6 and rarely had a problem. My eyes were a lot better then, however. The only problem with the attachable magnifiers is the reduced brightness. I have, and have used, the Leica 1.25 and another after market one and rarely take them out of their boxes. The only trouble with the high magnification finders comes when you try to use a wide angle lens. Even the 35 is problematic if you wear glasses.