sources
Belomo, the productor's page.
rugfit reseller
arriflex mount reseller
arriflex conversion reseller

Links:
http://www.pauck.de has a complete page full of useful info and comments. A must-visit.
Matt Mueller also has many examples and things, check this out.
pinky pentax nice shots and site! :-)
on a 5d, astronomical use
peleng for astronomical apps