Alternatives to Fotoman focusing helical??

[Ash]

Hey,

I'm planning on buying Robert's custom wide-angle camera. It sits a 65mm lens and 4x5 GG. The focus is fixed at infinity.

Since I can't afford a Hasselblad SWC any time soon, I plan to purchase this, then upgrade it with a focusing helical to allow focusing of sorts.

I see this focusing helical here:
http://www.fotomancamera.com/accessories_list.asp


Are there any alternatives, or am I stuck with this one option for a quality helical?



I'm looking at a lot of work anyway (removing the front plate, manufacturing a replacement, and adjusting it to be the correct infinity distance for a helical).


Any help would be appreciated.

Thanks!

[Ash]

Here's the concept:


Fit one of these (of any brand)


In place of that bit

[Bob Salomon]

Rodenstock and Schneider make fully calibrated helical focusing mounts with F and M scales as well as DOF scales for each of their lenses in 0 shutter. It is very easy to mount a lens into one and to mount one on a board or a camera directly.