RB67 ext. tubes

[FM2N]

Hello,
Can anyone tell me the bellows factor I need to add when using the 42mm extension tubes for my RB67?
Thanks
Arthur

 

[CGW]

Should be in here:

http://www.butkus.org/chinon/mamiya/mamiya_rb67_pro-s/mamiya_rb67_pro_s.htm

 

[Q.G.]

It will depend a lot on which lens you use the tube with.

 

[FM2N]

Thanks for the link it answered all of my questions.
Arthur