Just got a Mamiya 645 Super with two film backs but have run into a problem.

The film back attached to the camera is missing the darkslide (so it won't let me remove the back from the camera)

The extra backs I have have the darkslide installed in them (so I can't remove the dark slide w/out it being attached to the camera)

So... How can I either a) remove a film back that has no darkslide on it or b) remove a darkslide w/out it being attached to the camera?

  • 1
    \$\begingroup\$ There must be some sort of release pin/lever that operated the interlock, have a good look at the backs... \$\endgroup\$ Commented Nov 18, 2015 at 8:35
  • \$\begingroup\$ does the 645 have these tabs? \$\endgroup\$
    – db9dreamer
    Commented Nov 18, 2015 at 13:59
  • \$\begingroup\$ @dav1dsm1th Yea the 1st time I loaded that video I was like "Yes, this is it!" then I realized those are different film backs :p \$\endgroup\$
    – Shizam
    Commented Nov 18, 2015 at 20:11

1 Answer 1


Figured it out, there is a tiny black button (that looks like a screw) next to the bottom right screw in this photo, that is the button to press to release the slide. I kept pressing the giant button in the upper left thinking that clearly had to be the release :p

enter image description here


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