This issue came up in a recent thread by stephen_poe (thanks, stephen!) with a more generic subject header (Couple of Mamiya C220f questions), but rather than tag onto that I thought starting a more specific thread topic thats more search-friendly might up the odds of assistance for stephen_poe, myself and any others affected. My recently acquired backup C220F has an issue with the focus rack/bellows retracting itself about 10-20% after extending it out to maximum (minimum?) near-macro focus. Its difficult to figure out what might be causing it, as it seems to vary somewhat depending on the lens attached. The "backlash" effect is more pronounced with the shorter lenses 55mm-65mm-80mm-105mm, with the 135mm its less severe and the problem goes away entirely with the 180mm Super mounted. Nothing like this has occurred with any other Mamiya TLR I've used (various older C220, my other C220F, my C330S, or older C330f). Note this is the final all-black C220F variant with one-touch automatic WLF, not the far more common silver-trim C220. See below for pics of the focus scale, showing maximum extension on top, then the backlash position it retracts to if you let go of the focus knob. In day to day use it isn't a huge problem because it only affects very close settings (with the 80mm, maximum extension roughly frames a face from forehead to lower lip, the backlash pulls it back to a tight head and shoulders). But it annoys me that its there, and I'm afraid it may worsen. Anyone have any idea how to fix this? Removing the bottom cover doesn't reveal anything obvious. Thanks!