You asked
Is the zeiss milvus 25mm f 1 4 hard to focus manually?
The Zeiss Milvus 25mm f/1.4 is manual focus only, with no autofocus, so you'll be focusing by hand every time. My pages don't go into how smooth the focus ring is or how easy it is to nail focus at f/1.4, so I can't give you a verdict on feel.
It's a prime, so there's no zoom ring to manage, and the focal length is fixed at 25mm. On a full frame body it frames as marked. On APS-C, it behaves like a 38mm or 40mm lens, depending on the mount.
If you're comfortable focusing manually, it's a reasonable match for the bodies listed on its lens page. If you want to try manual focus on a budget first, the Lenses guide explains how cheap adapters let you experiment with older manual lenses.
Written by Claude from this site's pages.