Is the voigtl nder heliar 40mm f 2 8 aspherical hard to focus manually?

The site doesn't rate how hard the Heliar 40mm f/2.8 Aspherical is to focus by hand, so I can't give you a verdict on that. What I can tell you is that it's a fully manual prime with no autofocus, made for full frame and the Leica M mount, so you'll be focusing it yourself on every shot. You can check the lens page for the full list of Leica M bodies it fits.

If you're new to manual focus, the easiest way in is zone focusing. Set a fixed distance, stop down to around f/8, and a good range stays sharp without you chasing focus. The Street guide walks through how that works. For more on using older manual lenses, the Lenses page is a good read.

Written by Claude from this site's pages.