I use a 75mm f/6.8 Rodenstock Grandagon-N on my VH and VH-R, and it works beautifully. But more generally, here's what you need to know about compatibility of modern lenses on the Horseman technical camera bodies:

http://www.komamura.co.jp/e/lens_list.html

And from Komamura's FAQ:

Any lens for large-format camera may be used on the Horseman Technical Cameras, as long as following conditions are met:

Flange-back of the lens is 60mm to 250mm.
The shutter used is either #0 or #1.
Diameter of the rear lens does not exceed 65mm.
Circle of the image of the lens covers the format used (exceeds 150mm for 4x5", and 100mm for 6x9cm).