M210. Mirror flop. No fixed mirror. Some focus shift. It's primarily a visual scope. I found it tough to image with, even using the matching Mewlon Tak reducer/flattener.
VMC260L. Mirror flop. No fixed mirror. Likely some focus shift. But some amazing photos out there taken with these on Flickr, and US forums mainly.
VC200L. Fixed mirror. Tailored for imaging. Shame Vixen don't make a VC260L!