Thanks for looking :-)
That Pentax needed a heavy tripod /mirror lock up / and a cable release ....
So did mine; it lived on a huge Gitzo (bought for that purpose alone) but that solved nothing. I sometimes wondered if hand-held might not have been a more rewarding option, in that perhaps the body - mine - would have absorbed vibration rather than, as with the metal, just reflected it all around the place. But it was too heavy and cumbersome for holding and focussing, and that's when my eyes were excellent.
Michael used to have one too, and if memory serves, the same problems.
But it was actually a beautiful camera and I would have loved it to have worked out for me. I believe that the solution was a simple one: built-in shutters on
all the lenses, not just two, and those two being ones I didn't need! An elongated format Hasselblad is what we would then have had. I thnk it would have outsold 'bladdy by quite a margin, if only for the larger format. But if you screw up electronic flash, then which pro can find much use for it, other than for non-person shots outside the studio?
Another wasted opportunity, and one for which they had at least two iterations in which to think, and get it right.
Rob C