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I was hoping someone could clarify whether there is a magnifier that is compatible with the Mamiya M645 1000S camera? I have been searching online on and off for months and only ever see listings for magnifiers compatible with the Super/Pro/TL or AF models. If there is such a magnifier, does it only fit on the PD prism viewfinder and not the CdS prism viewfinder? Is there a particular model number associated with it (e.g the magnifier for the AF models is called FD402)? Also, if anyone can link me to an online listing for such a magnifier (preferably from UK/Europe), that would be amazing. Thank you.

I purchased auto extension tubes 2 and 3 for the Mamiya 645 100S, but it has not come with a manual. The two tubes are currently attached to each other. How do you detach one auto extension tube from another? How do you mount the auto extension tube to the Mamiya 645 100S and the CDS Prism? A link to a manual specifically about auto extension tubes for the Mamiya 645 would be appreciated. I have found no information online. Thank you.