In excellent conditions (7200' in the Sierras) Barnard's Galaxy was quite evident in my 80mm Stellarvue finder at 25x as a faint, elongated glow and it was just at the edge of visibility in my 15x50 IS binoculars but even then Hubble I/III was barely seen in my 18".

Another challenging project, by the way, is tracking down Hubble VII, a 16th magnitude globular cluster near the center of the galaxy.